高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (8): 2450.doi: 10.7503/cjcu20210107
李鹏杰, 周春妮, 王泽田, 郑子昂, 张玉敏, 王亮(), 肖标(
)
收稿日期:
2021-02-22
出版日期:
2021-08-10
发布日期:
2021-08-05
通讯作者:
王亮
E-mail:wangliang@jhun.edu.cn;biaoxiao@jhun.edu.cn
作者简介:
肖 标, 男, 博士, 副教授, 主要从事有机太阳能电池的共轭聚合物设计合成与器件研究. E-mail: 基金资助:
LI Pengjie, ZHOU Chunni, WANG Zetian, ZHENG Ziang, ZHANG Yumin, WANG Liang(), XIAO Biao(
)
Received:
2021-02-22
Online:
2021-08-10
Published:
2021-08-05
Contact:
WANG Liang
E-mail:wangliang@jhun.edu.cn;biaoxiao@jhun.edu.cn
Supported by:
摘要:
研究了铑催化N-嘧啶吲哚与乙烯基三乙氧基硅烷的C—H烯基化反应. 在以二氯(五甲基环戊二烯基)合铑(Ⅲ)二聚体{[RhCp*Cl2]2(Cp*: 五甲基环戊二烯基)}为催化剂, Cu(OAc)2为氧化剂, AgF为添加剂, 1,2-二氯乙烷为溶剂及反应温度为90 ℃条件下, 以42%~88%的收率得到末端吲哚乙烯衍生物. 动力学同位素效应实验结果为KH/KD=5.7∶1, 表明C—H键断裂可能是反应过程中的决速步骤. 竞争性实验结果表明, 含有供电子取代基的底物比吸电子取代基的底物反应活性高, 反应可能经历亲电性C—H键活化过程. 推测了可能的反应机理, 主要包括配位、 C—H键活化、 转金属化、 还原消除和氧化等步骤. 将此方法应用于一种δ-咔啉衍生物的制备.
中图分类号:
TrendMD:
李鹏杰, 周春妮, 王泽田, 郑子昂, 张玉敏, 王亮, 肖标. 铑催化吲哚与乙烯基三乙氧基硅烷的C—H烯基化反应. 高等学校化学学报, 2021, 42(8): 2450.
LI Pengjie, ZHOU Chunni, WANG Zetian, ZHENG Ziang, ZHANG Yumin, WANG Liang, XIAO Biao. Rhodium⁃catalyzed C—H Alkenylation of Indoles and Vinyltriethoxysilane. Chem. J. Chinese Universities, 2021, 42(8): 2450.
Scheme 2 给出2-乙烯基吲哚-3-甲醛(4)的合成路线. 向干燥的25 mL反应瓶中依次加入1.0 mmol 2-乙烯基-N-嘧啶吲哚-3-甲醛(3t)、 4.0 mmol NaOEt和8 mL DMSO; 将反应混合物于110 ℃反应15 min; 冷却至室温, 加入冰水(20 mL)淬灭; 用乙酸乙酯(20 mL×3)萃取, 用20 mL饱和NaCl溶液洗涤2次, 无水硫酸镁干燥后过滤并浓缩; 粗产品经硅胶柱层析纯化[V(乙酸乙酯)∶V(石油醚)=1∶15~1∶10]得到化合物4.
Scheme 2 给出2-乙烯基-N-苄基吲哚-3-甲醛(5)的合成路线. 在氩气保护下, 向干燥的10 mL反应瓶中依次加入0.4 mmol化合物4、 4 mL DMF, 将反应体系冷却至0 ℃; 分批加入0.44 mmol NaH反 应30 min; 再分批加入0.48 mmol溴化苄, 然后升至室温反应3 h; 加入5 mL冰水淬灭反应, 用乙酸乙酯(20 mL×3)萃取, 用20 mL饱和NaCl溶液洗涤2次, 无水硫酸镁干燥后过滤并浓缩; 粗产品经硅胶柱层析纯化[V(乙酸乙酯)∶V(石油醚)=1∶10~1∶5], 得到化合物5.
Compd. | Appearance | m. p./℃ | HRMS(calcd.), m/z [M+H]+ | Compd. | Appearance | m. p./℃ | HRMS(calcd.), m/z [M+H]+ |
---|---|---|---|---|---|---|---|
3a | White solid | 99—100 | 236.1181(236.1182) | 3p | Yellowish oil | — | 278.1659(278.1652) |
3b | White solid | 105—106 | 270.0791(270.0793) | 3q | Yellowish oil | — | 264.1496(264.1495) |
3c | White solid | 107—108 | 342.1609(342.1601) | 3r | Yellowish oil | — | 262.1346(262.1339) |
3d | White solid | 64—65 | 250.1340(250.1339) | 3s | Yellowish oil | — | 356.1763(356.1757) |
3e | White solid | 108—109 | 266.1288(266.1288) | 3t | Yellowish oil | — | 370.1558(370.1550) |
3f | White solid | 120—121 | 270.0797(270.0793) | 3u | Yellowish oil | — | 280.1088(280.1081) |
3g | White solid | 98—99 | 314.0288(314.0287) | 3v | Yellowish oil | — | 247.0978(247.1013) |
3h | White solid | 173—174 | 261.1138(261.1135) | 3w | Yellowish solid | 146—147 | 247.0981(247.0978) |
3i | Yellow solid | 137—138 | 281.1039(281.1033) | 3x | White solid | 60—61 | 250.1345(250.1339) |
3j | White solid | 145—146 | 250.1346(250.1339) | 3y | Yellowish oil | — | 314.0293(314.0287) |
3k | White solid | 126—127 | 254.1090(254.1088) | 3z | White solid | 112—113 | 312.1497(312.1495) |
3l | White solid | 106—107 | 270.0794(270.0793) | 4 | White solid | 74—75 | 172.0764(172.0757) |
3m | White solid | 79—80 | 314.0286(314.0287) | 5 | White solid | 91—92 | 262.1227(262.1226) |
3n | White solid | 79—80 | 250.1316(250.1339) | 6 | White solid | 102—103 | 259.1233(259.1230) |
3o | Yellowish oil | — | 250.1346(250.1339) |
表1 给出化合物3a~3z和4~6的理化数据, 核磁共振波谱数据见表2和3, 核磁共振谱图见 图S1~S37(见本文支持信息).
Table 1 Appearance, melting points and HRMS data of compounds 3a—3z and 4—6
Compd. | Appearance | m. p./℃ | HRMS(calcd.), m/z [M+H]+ | Compd. | Appearance | m. p./℃ | HRMS(calcd.), m/z [M+H]+ |
---|---|---|---|---|---|---|---|
3a | White solid | 99—100 | 236.1181(236.1182) | 3p | Yellowish oil | — | 278.1659(278.1652) |
3b | White solid | 105—106 | 270.0791(270.0793) | 3q | Yellowish oil | — | 264.1496(264.1495) |
3c | White solid | 107—108 | 342.1609(342.1601) | 3r | Yellowish oil | — | 262.1346(262.1339) |
3d | White solid | 64—65 | 250.1340(250.1339) | 3s | Yellowish oil | — | 356.1763(356.1757) |
3e | White solid | 108—109 | 266.1288(266.1288) | 3t | Yellowish oil | — | 370.1558(370.1550) |
3f | White solid | 120—121 | 270.0797(270.0793) | 3u | Yellowish oil | — | 280.1088(280.1081) |
3g | White solid | 98—99 | 314.0288(314.0287) | 3v | Yellowish oil | — | 247.0978(247.1013) |
3h | White solid | 173—174 | 261.1138(261.1135) | 3w | Yellowish solid | 146—147 | 247.0981(247.0978) |
3i | Yellow solid | 137—138 | 281.1039(281.1033) | 3x | White solid | 60—61 | 250.1345(250.1339) |
3j | White solid | 145—146 | 250.1346(250.1339) | 3y | Yellowish oil | — | 314.0293(314.0287) |
3k | White solid | 126—127 | 254.1090(254.1088) | 3z | White solid | 112—113 | 312.1497(312.1495) |
3l | White solid | 106—107 | 270.0794(270.0793) | 4 | White solid | 74—75 | 172.0764(172.0757) |
3m | White solid | 79—80 | 314.0286(314.0287) | 5 | White solid | 91—92 | 262.1227(262.1226) |
3n | White solid | 79—80 | 250.1316(250.1339) | 6 | White solid | 102—103 | 259.1233(259.1230) |
3o | Yellowish oil | — | 250.1346(250.1339) |
Compd. | 1H NMR(400 MHz, CDCl3), δ |
---|---|
3a[ | 8.78(d, J=4.8 Hz, 1H), 8.27(d, J=7.9 Hz, 0H), 7.58(d, J=7.2 Hz, 1H), 7.32—7.19(m, 1H), 7.15—7.08(m, 1H), 7.08—6.98(m, 0H), 5.53—5.38(m, 1H), 2.45(s, 2H) |
3b[ | 8.78(d, J=4.8 Hz, 2H), 7.81(d, J=8.4 Hz, 1H), 7.52(d, J=7.3 Hz, 2H), 7.41(t, J=7.4 Hz, 2H), 7.33(dd, J=8.3, 6.2 Hz, 1H), 7.19—7.07(m, 2H), 6.94(dd, J=17.7, 11.5 Hz, 1H), 6.68(d, J=7.9 Hz, 1H), 5.38(ddd, J=19.3, 14.6, 1.6 Hz, 2H), 5.21(s, 2H), 2.65(s, 3H) |
3c[ | 8.81(d, J=4.8 Hz, 2H), 8.09(dd, J=7.8, 1.4 Hz, 1H), 7.22—7.08(m, 3H), 6.94(dd, J=17.7, 11.5 Hz, 1H), 5.52(dd, J=11.5, 1.6 Hz, 1H), 5.38(dd, J=17.7, 1.6 Hz, 1H), 2.70(s, 3H) |
3d[ | 8.77(d, J=4.8 Hz, 2H), 8.19(d, J=8.5 Hz, 1H), 7.36(s, 1H), 7.09(ddd, J=23.5, 12.6, 6.4 Hz, 3H), 5.54—5.35(m, 2H), 2.49(s, 3H), 2.43(s, 3H) |
3e[ | 8.73(d, J=4.8 Hz, 2H), 8.22(d, J=9.0 Hz, 1H), 7.04(ddd, J=24.1, 14.8, 6.3 Hz, 3H), 6.89(dd, J=9.0, 2.6 Hz, 1H), 5.53—5.33(m, 2H), 3.88(s, 3H), 2.40(s, 3H) |
3f[ | 8.76(d, J=4.8 Hz, 1H), 8.20(d, J=8.8 Hz, 1H), 7.51(d, J=2.0 Hz, 1H), 7.19(dd, J=8.8, 2.1 Hz, 1H), 7.12(t, J=4.8 Hz, 1H), 7.08—6.97(m, 1H), 5.47(ddd, J=19.3, 14.6, 1.6 Hz, 1H), 2.38(s, 2H) |
3g[ | 8.80(d, J=4.8 Hz, 2H), 8.19(d, J=8.8 Hz, 1H), 7.70(d, J=1.9 Hz, 1H), 7.36(dd, J=8.8, 1.9 Hz, 1H), 7.17(t, J=4.8 Hz, 1H), 7.06(dd, J=17.7, 11.5 Hz, 1H), 5.50(ddd, J=19.0, 14.6, 1.3 Hz, 2H), 2.41(s, 3H) |
3h[ | 8.81(d, J=4.8 Hz, 2H), 8.27(dd, J=8.7, 0.6 Hz, 1H), 7.88(dd, J=1.6, 0.5 Hz, 1H), 7.48(dd, J=8.7, 1.6 Hz, 1H), 7.22(t, J=4.8 Hz, 1H), 7.01(ddd, J=17.7, 11.5, 0.5 Hz, 1H), 5.52(ddd, J=19.2, 14.6, 1.5 Hz, 2H), 2.42(s, 3H) |
3i[ | 8.87(d, J=4.8 Hz, 2H), 8.52(d, J=2.2 Hz, 1H), 8.29(d, J=9.2 Hz, 1H), 8.16(dd, J=9.2, 2.3 Hz, 1H), 7.28(t, J=4.8 Hz, 2H), 7.04(dd, J=17.8, 11.6 Hz, 1H), 5.60(dd, J=11.6, 1.4 Hz, 1H), 5.54(dd, J=17.7, 1.4 Hz, 1H), 2.50(s, 3H) |
3j[ | 8.76(d, J=4.8 Hz, 2H), 8.08—7.99(m, 1H), 7.42(d, J=8.0 Hz, 1H), 7.09(t, J=4.8 Hz, 1H), 7.06—6.91(m, 2H), 5.45—5.31(m, 2H), 2.46(s, 3H), 2.40(s, 3H) |
3k[ | 8.80(d, J=4.8 Hz, 2H), 8.09(dd, J=11.0, 2.3 Hz, 1H), 7.49(dd, J=8.6, 5.5 Hz, 1H), 7.16(t, J=4.8 Hz, 1H), 7.13—6.96(m, 2H), 5.46(ddd, J=19.1, 14.6, 1.4 Hz, 2H), 2.44(s, 3H) |
Compd. | 1H NMR(400 MHz, CDCl3), δ |
3l[ | 8.80(d, J=4.8 Hz, 2H), 8.35(d, J=1.8 Hz, 1H), 7.48(d, J=8.4 Hz, 1H), 7.22(dd, J=8.4, 1.8 Hz, 1H), 7.16(t, J=4.8 Hz, 1H), 7.05(dd, J=17.7, 11.5 Hz, 1H), 5.48(ddd, J=19.2, 14.6, 1.4 Hz, 2H), 2.43(s, 3H) |
3m[ | 8.76(d, J=4.8 Hz, 2H), 8.46(d, J=1.6 Hz, 1H), 7.39(d, J=8.3 Hz, 1H), 7.31(dd, J=8.3, 1.7 Hz, 1H), 7.11(t, J=4.8 Hz, 1H), 7.00(dd, J=17.7, 11.5 Hz, 1H), 5.45(ddd, J=19.2, 14.6, 1.5 Hz, 2H), 2.38(s, 3H) |
3n[ | 8.89(d, J=4.8 Hz, 2H), 7.48(d, J=7.8 Hz, 1H), 7.34(t, J=4.8 Hz, 1H), 7.13(t, J=7.5 Hz, 1H), 7.01(d, J=7.1 Hz, 1H), 6.71(dd, J=18.1, 11.4 Hz, 1H), 5.42—5.26(m, 2H), 2.46(s, 3H), 1.94(s, 3H) |
3o[ | 8.81(d, J=4.8 Hz, 2H), 8.28(d, J=8.1 Hz, 1H), 7.63(d, J=7.5 Hz, 1H), 7.34—7.20(m, 4H), 7.15(t, J=4.8 Hz, 1H), 7.10—6.95(m, 1H), 5.46(s, 1H), 5.42(d, J=4.1 Hz, 1H), 2.94(q, J=7.5 Hz, 2H), 1.36(t, J=7.6 Hz, 3H) |
3p[ | 8.76(d, J=4.8 Hz, 2H), 8.22(d, J=8.2 Hz, 1H), 7.58(d, J=7.7 Hz, 1H), 7.23(dt, J=20.1, 7.1 Hz, 2H), 7.09(t, J=4.8 Hz, 1H), 6.97(dd, J=17.6, 11.7 Hz, 1H), 5.38(dd, J=14.8, 7.9 Hz, 2H), 2.91—2.78(m, 2H), 1.69(dt, J=15.4, 7.6 Hz, 2H), 1.47(dq, J=14.6, 7.4 Hz, 2H), 0.96(t, J=7.3 Hz, 3H) |
3q[ | 8.78(d, J=4.8 Hz, 1H), 8.21(dd, J=8.3, 0.5 Hz, 1H), 7.80(dd, J=7.8, 0.6 Hz, 1H), 7.28—7.22(m, 1H), 7.22—7.14(m, 1H), 7.12(t, J=4.8 Hz, 0H), 6.98(dd, J=17.7, 11.4 Hz, 1H), 5.47—5.36(m, 1H), 5.25(dd, J=17.7, 1.2 Hz, 1H), 3.51(dt, J=14.3, 7.1 Hz, 1H), 1.50(d, J=0.5 Hz, 2H), 1.48(d, J=0.5 Hz, 2H). |
3r[ | 8.80(d, J=4.8 Hz, 2H), 8.31(dd, J=8.3, 0.5 Hz, 1H), 7.59(dd, J=7.7, 0.5 Hz, 1H), 7.30(dd, J=11.4, 4.0 Hz, 2H), 7.24(dd, J=7.6, 7.2 Hz, 1H), 7.13(td, J=4.8, 0.6 Hz, 1H), 7.04(dd, J=17.7, 11.5 Hz, 1H), 6.17—6.03(m, 1H), 5.54—5.41(m, 2H), 5.19—5.04(m, 2H), 3.70—3.62(m, 2H) |
3s[ | 8.76(d, J=4.8 Hz, 1H), 8.30(d, J=8.3 Hz, 1H), 7.62(d, J=7.8 Hz, 1H), 7.40—7.24(m, 3H), 7.24—7.16(m, 1H), 7.11(t, J=4.8 Hz, 1H), 7.03(dd, J=17.7, 11.5 Hz, 1H), 5.63(dd, J=17.7, 1.5 Hz, 1H), 5.47(dd, J=11.5, 1.5 Hz, 1H), 5.14(s, 1H), 3.93(s, 1H) |
3t[ | 8.78(d, J=4.8 Hz, 2H), 8.26(d, J=8.3 Hz, 1H), 7.63(dd, J=7.7, 0.6 Hz, 1H), 7.36(dd, J=7.0, 4.9 Hz, 4H), 7.33—7.20(m, 4H), 7.11(t, J=4.8 Hz, 1H), 6.99(dd, J=17.7, 11.5 Hz, 1H), 5.53—5.36(m, 2H), 4.58(s, 2H), 3.81(t, J=7.7 Hz, 2H), 3.26(t, J=7.7 Hz, 2H) |
3u[ | 8.80(d, J=4.8 Hz, 2H), 8.40—8.31(m, 1H), 7.43—7.38(m, 1H), 7.34—7.20(m, 4H), 7.16(t, J=4.8 Hz, 1H), 7.05(dd, J=17.8, 11.7 Hz, 1H), 5.71(dd, J=17.8, 1.6 Hz, 1H), 5.47(dd, J=11.7, 1.6 Hz, 1H), 2.43(s, 3H) |
3x[ | 8.59(s, 2H), 8.12(d, J=7.9 Hz, 1H), 7.56(d, J=7.6 Hz, 1H), 7.36—7.10(m, 2H), 7.00(dd, J=17.6, 11.6 Hz, 1H), 5.53—5.34(m, 2H), 2.43(s, 3H), 2.32(s, 3H) |
Table 2 1H NMR and 13C NMR data of compounds 3a—3u and 3x
Compd. | 1H NMR(400 MHz, CDCl3), δ |
---|---|
3a[ | 8.78(d, J=4.8 Hz, 1H), 8.27(d, J=7.9 Hz, 0H), 7.58(d, J=7.2 Hz, 1H), 7.32—7.19(m, 1H), 7.15—7.08(m, 1H), 7.08—6.98(m, 0H), 5.53—5.38(m, 1H), 2.45(s, 2H) |
3b[ | 8.78(d, J=4.8 Hz, 2H), 7.81(d, J=8.4 Hz, 1H), 7.52(d, J=7.3 Hz, 2H), 7.41(t, J=7.4 Hz, 2H), 7.33(dd, J=8.3, 6.2 Hz, 1H), 7.19—7.07(m, 2H), 6.94(dd, J=17.7, 11.5 Hz, 1H), 6.68(d, J=7.9 Hz, 1H), 5.38(ddd, J=19.3, 14.6, 1.6 Hz, 2H), 5.21(s, 2H), 2.65(s, 3H) |
3c[ | 8.81(d, J=4.8 Hz, 2H), 8.09(dd, J=7.8, 1.4 Hz, 1H), 7.22—7.08(m, 3H), 6.94(dd, J=17.7, 11.5 Hz, 1H), 5.52(dd, J=11.5, 1.6 Hz, 1H), 5.38(dd, J=17.7, 1.6 Hz, 1H), 2.70(s, 3H) |
3d[ | 8.77(d, J=4.8 Hz, 2H), 8.19(d, J=8.5 Hz, 1H), 7.36(s, 1H), 7.09(ddd, J=23.5, 12.6, 6.4 Hz, 3H), 5.54—5.35(m, 2H), 2.49(s, 3H), 2.43(s, 3H) |
3e[ | 8.73(d, J=4.8 Hz, 2H), 8.22(d, J=9.0 Hz, 1H), 7.04(ddd, J=24.1, 14.8, 6.3 Hz, 3H), 6.89(dd, J=9.0, 2.6 Hz, 1H), 5.53—5.33(m, 2H), 3.88(s, 3H), 2.40(s, 3H) |
3f[ | 8.76(d, J=4.8 Hz, 1H), 8.20(d, J=8.8 Hz, 1H), 7.51(d, J=2.0 Hz, 1H), 7.19(dd, J=8.8, 2.1 Hz, 1H), 7.12(t, J=4.8 Hz, 1H), 7.08—6.97(m, 1H), 5.47(ddd, J=19.3, 14.6, 1.6 Hz, 1H), 2.38(s, 2H) |
3g[ | 8.80(d, J=4.8 Hz, 2H), 8.19(d, J=8.8 Hz, 1H), 7.70(d, J=1.9 Hz, 1H), 7.36(dd, J=8.8, 1.9 Hz, 1H), 7.17(t, J=4.8 Hz, 1H), 7.06(dd, J=17.7, 11.5 Hz, 1H), 5.50(ddd, J=19.0, 14.6, 1.3 Hz, 2H), 2.41(s, 3H) |
3h[ | 8.81(d, J=4.8 Hz, 2H), 8.27(dd, J=8.7, 0.6 Hz, 1H), 7.88(dd, J=1.6, 0.5 Hz, 1H), 7.48(dd, J=8.7, 1.6 Hz, 1H), 7.22(t, J=4.8 Hz, 1H), 7.01(ddd, J=17.7, 11.5, 0.5 Hz, 1H), 5.52(ddd, J=19.2, 14.6, 1.5 Hz, 2H), 2.42(s, 3H) |
3i[ | 8.87(d, J=4.8 Hz, 2H), 8.52(d, J=2.2 Hz, 1H), 8.29(d, J=9.2 Hz, 1H), 8.16(dd, J=9.2, 2.3 Hz, 1H), 7.28(t, J=4.8 Hz, 2H), 7.04(dd, J=17.8, 11.6 Hz, 1H), 5.60(dd, J=11.6, 1.4 Hz, 1H), 5.54(dd, J=17.7, 1.4 Hz, 1H), 2.50(s, 3H) |
3j[ | 8.76(d, J=4.8 Hz, 2H), 8.08—7.99(m, 1H), 7.42(d, J=8.0 Hz, 1H), 7.09(t, J=4.8 Hz, 1H), 7.06—6.91(m, 2H), 5.45—5.31(m, 2H), 2.46(s, 3H), 2.40(s, 3H) |
3k[ | 8.80(d, J=4.8 Hz, 2H), 8.09(dd, J=11.0, 2.3 Hz, 1H), 7.49(dd, J=8.6, 5.5 Hz, 1H), 7.16(t, J=4.8 Hz, 1H), 7.13—6.96(m, 2H), 5.46(ddd, J=19.1, 14.6, 1.4 Hz, 2H), 2.44(s, 3H) |
Compd. | 1H NMR(400 MHz, CDCl3), δ |
3l[ | 8.80(d, J=4.8 Hz, 2H), 8.35(d, J=1.8 Hz, 1H), 7.48(d, J=8.4 Hz, 1H), 7.22(dd, J=8.4, 1.8 Hz, 1H), 7.16(t, J=4.8 Hz, 1H), 7.05(dd, J=17.7, 11.5 Hz, 1H), 5.48(ddd, J=19.2, 14.6, 1.4 Hz, 2H), 2.43(s, 3H) |
3m[ | 8.76(d, J=4.8 Hz, 2H), 8.46(d, J=1.6 Hz, 1H), 7.39(d, J=8.3 Hz, 1H), 7.31(dd, J=8.3, 1.7 Hz, 1H), 7.11(t, J=4.8 Hz, 1H), 7.00(dd, J=17.7, 11.5 Hz, 1H), 5.45(ddd, J=19.2, 14.6, 1.5 Hz, 2H), 2.38(s, 3H) |
3n[ | 8.89(d, J=4.8 Hz, 2H), 7.48(d, J=7.8 Hz, 1H), 7.34(t, J=4.8 Hz, 1H), 7.13(t, J=7.5 Hz, 1H), 7.01(d, J=7.1 Hz, 1H), 6.71(dd, J=18.1, 11.4 Hz, 1H), 5.42—5.26(m, 2H), 2.46(s, 3H), 1.94(s, 3H) |
3o[ | 8.81(d, J=4.8 Hz, 2H), 8.28(d, J=8.1 Hz, 1H), 7.63(d, J=7.5 Hz, 1H), 7.34—7.20(m, 4H), 7.15(t, J=4.8 Hz, 1H), 7.10—6.95(m, 1H), 5.46(s, 1H), 5.42(d, J=4.1 Hz, 1H), 2.94(q, J=7.5 Hz, 2H), 1.36(t, J=7.6 Hz, 3H) |
3p[ | 8.76(d, J=4.8 Hz, 2H), 8.22(d, J=8.2 Hz, 1H), 7.58(d, J=7.7 Hz, 1H), 7.23(dt, J=20.1, 7.1 Hz, 2H), 7.09(t, J=4.8 Hz, 1H), 6.97(dd, J=17.6, 11.7 Hz, 1H), 5.38(dd, J=14.8, 7.9 Hz, 2H), 2.91—2.78(m, 2H), 1.69(dt, J=15.4, 7.6 Hz, 2H), 1.47(dq, J=14.6, 7.4 Hz, 2H), 0.96(t, J=7.3 Hz, 3H) |
3q[ | 8.78(d, J=4.8 Hz, 1H), 8.21(dd, J=8.3, 0.5 Hz, 1H), 7.80(dd, J=7.8, 0.6 Hz, 1H), 7.28—7.22(m, 1H), 7.22—7.14(m, 1H), 7.12(t, J=4.8 Hz, 0H), 6.98(dd, J=17.7, 11.4 Hz, 1H), 5.47—5.36(m, 1H), 5.25(dd, J=17.7, 1.2 Hz, 1H), 3.51(dt, J=14.3, 7.1 Hz, 1H), 1.50(d, J=0.5 Hz, 2H), 1.48(d, J=0.5 Hz, 2H). |
3r[ | 8.80(d, J=4.8 Hz, 2H), 8.31(dd, J=8.3, 0.5 Hz, 1H), 7.59(dd, J=7.7, 0.5 Hz, 1H), 7.30(dd, J=11.4, 4.0 Hz, 2H), 7.24(dd, J=7.6, 7.2 Hz, 1H), 7.13(td, J=4.8, 0.6 Hz, 1H), 7.04(dd, J=17.7, 11.5 Hz, 1H), 6.17—6.03(m, 1H), 5.54—5.41(m, 2H), 5.19—5.04(m, 2H), 3.70—3.62(m, 2H) |
3s[ | 8.76(d, J=4.8 Hz, 1H), 8.30(d, J=8.3 Hz, 1H), 7.62(d, J=7.8 Hz, 1H), 7.40—7.24(m, 3H), 7.24—7.16(m, 1H), 7.11(t, J=4.8 Hz, 1H), 7.03(dd, J=17.7, 11.5 Hz, 1H), 5.63(dd, J=17.7, 1.5 Hz, 1H), 5.47(dd, J=11.5, 1.5 Hz, 1H), 5.14(s, 1H), 3.93(s, 1H) |
3t[ | 8.78(d, J=4.8 Hz, 2H), 8.26(d, J=8.3 Hz, 1H), 7.63(dd, J=7.7, 0.6 Hz, 1H), 7.36(dd, J=7.0, 4.9 Hz, 4H), 7.33—7.20(m, 4H), 7.11(t, J=4.8 Hz, 1H), 6.99(dd, J=17.7, 11.5 Hz, 1H), 5.53—5.36(m, 2H), 4.58(s, 2H), 3.81(t, J=7.7 Hz, 2H), 3.26(t, J=7.7 Hz, 2H) |
3u[ | 8.80(d, J=4.8 Hz, 2H), 8.40—8.31(m, 1H), 7.43—7.38(m, 1H), 7.34—7.20(m, 4H), 7.16(t, J=4.8 Hz, 1H), 7.05(dd, J=17.8, 11.7 Hz, 1H), 5.71(dd, J=17.8, 1.6 Hz, 1H), 5.47(dd, J=11.7, 1.6 Hz, 1H), 2.43(s, 3H) |
3x[ | 8.59(s, 2H), 8.12(d, J=7.9 Hz, 1H), 7.56(d, J=7.6 Hz, 1H), 7.36—7.10(m, 2H), 7.00(dd, J=17.6, 11.6 Hz, 1H), 5.53—5.34(m, 2H), 2.43(s, 3H), 2.32(s, 3H) |
Compd. | 1H NMR(400 MHz, CDCl3), δ | 13C NMR(100 MHz, CDCl3), δ |
---|---|---|
3v | 10.18(s, 1H), 8.87(d, J=4.8 Hz, 2H), 8.47(dd, J=7.5, 1.7 Hz, 1H), 8.24—8.13(m, 1H), 7.41—7.34(m, 2H), 7.31(t, J=4.9 Hz, 1H), 7.28—7.22(m, 1H), 5.78(dd, J=11.3, 1.4 Hz, 1H), 5.68(dd, J=17.4, 1.4 Hz, 1H) | 187.6, 158.5 157.2, 148.6, 136.0, 126.4, 126.2, 125.3, 124.8, 124.2, 122.0, 118.7, 118.5, 113.7 |
3w | 8.88(d, J=4.8 Hz, 2H), 8.22—8.09(m, 1H), 7.82—7.69(m, 1H), 7.40—7.35(m, 2H), 7.35—7.31(m, 1H), 7.11(dd, J=17.7, 11.6 Hz, 1H), 6.34(d, J=17.7 Hz, 1H), 5.74(d, J=11.7 Hz, 1H) | 158.6, 156.8, 144.5, 135.5, 127.9, 125.9, 125.4, 123.8, 121.9, 119.3, 119.0, 116.1, 114.3, 89.0 |
3y | 8.77(d, J=4.8 Hz, 2H), 8.26(dd, J=8.6, 0.6 Hz, 1H), 7.61—7.51(m, 1H), 7.31—7.20(m, 2H), 7.05(dd, J=18.2, 12.1 Hz, 1H), 5.50—5.39(m, 2H), 2.44(s, 3H) | 158.2, 158.1, 136.2, 133.9, 130.7, 128.8, 123.9, 121.7, 118.8, 116.8, 116.7, 115.4, 113.7, 10.3 |
3z | 8.98(s, 2H), 8.32(d, J=8.2 Hz, 1H), 7.67—7.56(m, 3H), 7.55—7.49(m, 2H), 7.48—7.43(m, 1H), 7.34—7.24(m, 2H), 7.10(dd, J=17.7, 11.6 Hz, 1H), 5.61—5.37(m, 2H), 2.46(s, 3H) | 157.2, 156.0, 136.2, 134.1, 134.0, 130.7, 129.6, 129.4, 128.9, 128.6, 126.6, 123.9, 121.8, 118.8, 116.8, 115.5, 113.8, 10.3 |
4 | 12.27(s, 1H), 10.25(s, 1H), 8.11(dd, J=7.8, 1.0 Hz, 1H), 7.46(dt, J=8.1, 0.8 Hz, 1H), 7.40(dd, J=17.6, 11.4 Hz, 1H), 7.30—7.26(m, 1H), 7.22—7.18(m, 1H), 6.21(dd, J=17.6, 0.5 Hz, 1H), 5.72(d, J=11.8 Hz, 1H) | 184.9, 144.6, 136.3, 125.5, 124.2, 122.2, 120. 9, 120.3, 114.1, 111.7 |
5 | 10.12(s, 1H), 8.43(dd, J=6.8, 1.2 Hz, 1H), 7.37—7.28(m, 4H), 7.27—7.24(m, 2H), 7.11—7.00(m, 2H), 6.83(dd, J=17.4, 11.5 Hz, 1H), 5.83(ddd, J=18.6, 14.5, 1.1 Hz, 2H), 5.38(s, 2H) | 185.9, 148.0, 136.9, 135.8, 129.0, 127.9, 127.2, 126.0, 125.6, 124.3, 123.7, 123.2, 122.2, 115.5, 110.0, 47.4 |
6 | 9.35(d, J=0.8 Hz, 1H), 8.53(d, J=5.8 Hz, 1H), 8.19(d, J=7.8 Hz, 1H), 7.51—7.47(m, 1H), 7.41(d, J=8.2 Hz, 1H), 7.38—7.31(m, 1H), 7.30—7.26(m, 4H), 7.13(dd, J=5.4, 2.5 Hz, 2H), 5.51(s, 2H) | 145.2, 144.8, 142.9 140.6, 136.1, 129.0, 127.9, 127.0, 126.4, 121.6, 120.9, 120.8, 119.9, 109.5, 104.4, 46.7 |
Table 3 1H NMR and 13C NMR data of compounds 3v, 3w, 3y, 3z and 4—6
Compd. | 1H NMR(400 MHz, CDCl3), δ | 13C NMR(100 MHz, CDCl3), δ |
---|---|---|
3v | 10.18(s, 1H), 8.87(d, J=4.8 Hz, 2H), 8.47(dd, J=7.5, 1.7 Hz, 1H), 8.24—8.13(m, 1H), 7.41—7.34(m, 2H), 7.31(t, J=4.9 Hz, 1H), 7.28—7.22(m, 1H), 5.78(dd, J=11.3, 1.4 Hz, 1H), 5.68(dd, J=17.4, 1.4 Hz, 1H) | 187.6, 158.5 157.2, 148.6, 136.0, 126.4, 126.2, 125.3, 124.8, 124.2, 122.0, 118.7, 118.5, 113.7 |
3w | 8.88(d, J=4.8 Hz, 2H), 8.22—8.09(m, 1H), 7.82—7.69(m, 1H), 7.40—7.35(m, 2H), 7.35—7.31(m, 1H), 7.11(dd, J=17.7, 11.6 Hz, 1H), 6.34(d, J=17.7 Hz, 1H), 5.74(d, J=11.7 Hz, 1H) | 158.6, 156.8, 144.5, 135.5, 127.9, 125.9, 125.4, 123.8, 121.9, 119.3, 119.0, 116.1, 114.3, 89.0 |
3y | 8.77(d, J=4.8 Hz, 2H), 8.26(dd, J=8.6, 0.6 Hz, 1H), 7.61—7.51(m, 1H), 7.31—7.20(m, 2H), 7.05(dd, J=18.2, 12.1 Hz, 1H), 5.50—5.39(m, 2H), 2.44(s, 3H) | 158.2, 158.1, 136.2, 133.9, 130.7, 128.8, 123.9, 121.7, 118.8, 116.8, 116.7, 115.4, 113.7, 10.3 |
3z | 8.98(s, 2H), 8.32(d, J=8.2 Hz, 1H), 7.67—7.56(m, 3H), 7.55—7.49(m, 2H), 7.48—7.43(m, 1H), 7.34—7.24(m, 2H), 7.10(dd, J=17.7, 11.6 Hz, 1H), 5.61—5.37(m, 2H), 2.46(s, 3H) | 157.2, 156.0, 136.2, 134.1, 134.0, 130.7, 129.6, 129.4, 128.9, 128.6, 126.6, 123.9, 121.8, 118.8, 116.8, 115.5, 113.8, 10.3 |
4 | 12.27(s, 1H), 10.25(s, 1H), 8.11(dd, J=7.8, 1.0 Hz, 1H), 7.46(dt, J=8.1, 0.8 Hz, 1H), 7.40(dd, J=17.6, 11.4 Hz, 1H), 7.30—7.26(m, 1H), 7.22—7.18(m, 1H), 6.21(dd, J=17.6, 0.5 Hz, 1H), 5.72(d, J=11.8 Hz, 1H) | 184.9, 144.6, 136.3, 125.5, 124.2, 122.2, 120. 9, 120.3, 114.1, 111.7 |
5 | 10.12(s, 1H), 8.43(dd, J=6.8, 1.2 Hz, 1H), 7.37—7.28(m, 4H), 7.27—7.24(m, 2H), 7.11—7.00(m, 2H), 6.83(dd, J=17.4, 11.5 Hz, 1H), 5.83(ddd, J=18.6, 14.5, 1.1 Hz, 2H), 5.38(s, 2H) | 185.9, 148.0, 136.9, 135.8, 129.0, 127.9, 127.2, 126.0, 125.6, 124.3, 123.7, 123.2, 122.2, 115.5, 110.0, 47.4 |
6 | 9.35(d, J=0.8 Hz, 1H), 8.53(d, J=5.8 Hz, 1H), 8.19(d, J=7.8 Hz, 1H), 7.51—7.47(m, 1H), 7.41(d, J=8.2 Hz, 1H), 7.38—7.31(m, 1H), 7.30—7.26(m, 4H), 7.13(dd, J=5.4, 2.5 Hz, 2H), 5.51(s, 2H) | 145.2, 144.8, 142.9 140.6, 136.1, 129.0, 127.9, 127.0, 126.4, 121.6, 120.9, 120.8, 119.9, 109.5, 104.4, 46.7 |
Entry | Solvent | Temperature | "F" salt | n(2)∶ n(1a) | Yieldb(%) | Entry | Solvent | Temperature | "F" salt | n(2)∶ n(1a) | Yieldb(%) |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | MeCN | 100 | AgF | 3∶1 | 51 | 13 | DCE | 80 | AgF | 3∶1 | 43 |
2 | DMF | 100 | AgF | 3∶1 | 51 | 14 | DCE | 90 | AgBF4 | 3∶1 | 67 |
3 | Toluene | 100 | AgF | 3∶1 | 42 | 15 | DCE | 90 | KHF2 | 3∶1 | 60 |
4 | DMSO | 100 | AgF | 3∶1 | 70 | 16 | DCE | 90 | LiF | 3∶1 | 0 |
5 | DCE | 100 | AgF | 3∶1 | 72 | 17 | DCE | 90 | TBAF | 3∶1 | 0 |
6 | THF | 100 | AgF | 3∶1 | 0 | 18 | DCE | 90 | — | 3∶1 | 0 |
7 | t?BuOH | 100 | AgF | 3∶1 | 0 | 19 | DCE | 90 | AgF | 1∶1 | 82 |
8 | 1,4?Dioxane | 100 | AgF | 3∶1 | 0 | 20 | DCE | 90 | AgF | 1.5∶1 | 82 |
9c | DCE/DMF | 100 | AgF | 3∶1 | 65 | 21 | DCE | 90 | AgF | 2∶1 | 74 |
10 | DCE | 110 | AgF | 3∶1 | 74 | 22 | DCE | 90 | AgF | 2.5∶1 | 85 |
11 | DCE | 120 | AgF | 3∶1 | 55 | 23 | DCE | 90 | AgF | 3.5∶1 | 64 |
12 | DCE | 90 | AgF | 3∶1 | 88 | 24 | DCE | 90 | AgF | 4∶1 | 52 |
Table 4 Optimization of the reaction conditionsa
Entry | Solvent | Temperature | "F" salt | n(2)∶ n(1a) | Yieldb(%) | Entry | Solvent | Temperature | "F" salt | n(2)∶ n(1a) | Yieldb(%) |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | MeCN | 100 | AgF | 3∶1 | 51 | 13 | DCE | 80 | AgF | 3∶1 | 43 |
2 | DMF | 100 | AgF | 3∶1 | 51 | 14 | DCE | 90 | AgBF4 | 3∶1 | 67 |
3 | Toluene | 100 | AgF | 3∶1 | 42 | 15 | DCE | 90 | KHF2 | 3∶1 | 60 |
4 | DMSO | 100 | AgF | 3∶1 | 70 | 16 | DCE | 90 | LiF | 3∶1 | 0 |
5 | DCE | 100 | AgF | 3∶1 | 72 | 17 | DCE | 90 | TBAF | 3∶1 | 0 |
6 | THF | 100 | AgF | 3∶1 | 0 | 18 | DCE | 90 | — | 3∶1 | 0 |
7 | t?BuOH | 100 | AgF | 3∶1 | 0 | 19 | DCE | 90 | AgF | 1∶1 | 82 |
8 | 1,4?Dioxane | 100 | AgF | 3∶1 | 0 | 20 | DCE | 90 | AgF | 1.5∶1 | 82 |
9c | DCE/DMF | 100 | AgF | 3∶1 | 65 | 21 | DCE | 90 | AgF | 2∶1 | 74 |
10 | DCE | 110 | AgF | 3∶1 | 74 | 22 | DCE | 90 | AgF | 2.5∶1 | 85 |
11 | DCE | 120 | AgF | 3∶1 | 55 | 23 | DCE | 90 | AgF | 3.5∶1 | 64 |
12 | DCE | 90 | AgF | 3∶1 | 88 | 24 | DCE | 90 | AgF | 4∶1 | 52 |
Entry | Product | R1 | R2 | R3 | Yield*(%) | Entry | Product | R1 | R2 | R3 | Yield*(%) |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 3a | Me | H | H | 88 | 14 | 3n | Me | 7?Me | H | 68 |
2 | 3b | Me | 4?OBn | H | 60 | 15 | 3o | H | Et | H | 65 |
3 | 3c | Me | 4?Cl | H | 58 | 16 | 3p | H | n?Bu | H | 38 |
4 | 3d | Me | 5?Me | H | 69 | 17 | 3q | H | i?Pr | H | 42 |
5 | 3e | Me | 5?OMe | H | 63 | 18 | 3r | H | Allyl | H | 51 |
6 | 3f | Me | 5?Cl | H | 72 | 19 | 3s | H | CH2CH2OBn | H | 61 |
7 | 3g | Me | 5?Br | H | 79 | 20 | 3t | H | CH2CO2Bn | H | 59 |
8 | 3h | Me | 5?CN | H | 66 | 21 | 3u | H | OAc | H | 50 |
9 | 3i | Me | 5?NO2 | H | 56 | 22 | 3v | H | CHO | H | 42 |
10 | 3j | Me | 6?Me | H | 71 | 23 | 3w | H | CN | H | 44 |
11 | 3k | Me | 6?F | H | 53 | 24 | 3x | H | H | Me | 58 |
12 | 3l | Me | 6?Cl | H | 64 | 25 | 3y | H | H | Br | 47 |
13 | 3m | Me | 6?Br | H | 61 | 26 | 3z | H | H | Ph | 72 |
Table 5 Substrate scope of C—H alkenylation of indoles and vinyltriethoxysilane
Entry | Product | R1 | R2 | R3 | Yield*(%) | Entry | Product | R1 | R2 | R3 | Yield*(%) |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 3a | Me | H | H | 88 | 14 | 3n | Me | 7?Me | H | 68 |
2 | 3b | Me | 4?OBn | H | 60 | 15 | 3o | H | Et | H | 65 |
3 | 3c | Me | 4?Cl | H | 58 | 16 | 3p | H | n?Bu | H | 38 |
4 | 3d | Me | 5?Me | H | 69 | 17 | 3q | H | i?Pr | H | 42 |
5 | 3e | Me | 5?OMe | H | 63 | 18 | 3r | H | Allyl | H | 51 |
6 | 3f | Me | 5?Cl | H | 72 | 19 | 3s | H | CH2CH2OBn | H | 61 |
7 | 3g | Me | 5?Br | H | 79 | 20 | 3t | H | CH2CO2Bn | H | 59 |
8 | 3h | Me | 5?CN | H | 66 | 21 | 3u | H | OAc | H | 50 |
9 | 3i | Me | 5?NO2 | H | 56 | 22 | 3v | H | CHO | H | 42 |
10 | 3j | Me | 6?Me | H | 71 | 23 | 3w | H | CN | H | 44 |
11 | 3k | Me | 6?F | H | 53 | 24 | 3x | H | H | Me | 58 |
12 | 3l | Me | 6?Cl | H | 64 | 25 | 3y | H | H | Br | 47 |
13 | 3m | Me | 6?Br | H | 61 | 26 | 3z | H | H | Ph | 72 |
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