高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (7): 1567.doi: 10.7503/cjcu20190665
收稿日期:
2019-12-13
出版日期:
2020-07-10
发布日期:
2020-05-29
通讯作者:
冯乙巳
E-mail:fengyisi@hfut.edu.cn
基金资助:
Received:
2019-12-13
Online:
2020-07-10
Published:
2020-05-29
Contact:
Yisi FENG
E-mail:fengyisi@hfut.edu.cn
Supported by:
摘要:
以2,3-丁二酮作为光催化剂, 三氟甲基亚磺酸钠作为三氟甲基化试剂, 在可见光诱导下, 采用温和的反应条件高效地实现了烯烃衍生物的氧化三氟甲基化反应, 以52%~78%的收率合成了22个含有三氟甲基酮类结构的化合物(3a~3v). 该反应的特点是用2,3-丁二酮代替昂贵的金属光催化剂, 在可见光范围内从廉价的三氟甲基化试剂中引发出三氟甲基自由基, 并在氧化剂的协同作用下进行烯烃的氧化三氟甲基化反应.
中图分类号:
TrendMD:
徐文艺,冯乙巳. 2,3-丁二酮介导的CF3SO2Na与烯烃的氧化三氟甲基化反应. 高等学校化学学报, 2020, 41(7): 1567.
XU Wenyi,FENG Yisi. Oxidative Trifluoromethylation of CF3SO2Na with Olefins Mediated by Diacetyl†. Chem. J. Chinese Universities, 2020, 41(7): 1567.
Compd. | Appearance | Yield*(%) | m. p./℃ | GC-MS(calcd.), m/z[M+H]+ |
---|---|---|---|---|
3a | White solid | 68 | 39—40 | 189.07(189.04) |
3b | White solid | 65 | 55—58 | 203.07(203.06) |
3c | Colorless liquid | 72 | None | 219.10(219.06) |
3d | Colorless liquid | 62 | None | 207.09(207.04) |
3e | White solid | 78 | 55—56 | 223.04(223.01) |
3f | White solid | 61 | 75—76 | 266.91(266.96) |
3g | White solid | 76 | 33—34 | 245.10(245.11) |
3h | Colorless liquid | 62 | None | 234.05(234.03) |
3i | White solid | 67 | 74—77 | 247.04(247.05) |
3j | White solid | 62 | 78—80 | 237.06(237.02) |
3k | Colorless liquid | 60 | None | 223.04(223.01) |
3l | Yellow liquid | 52 | None | 266.91(266.96) |
3m | Colorless liquid | 55 | None | 203.07(203.06) |
3n | Yellow liquid | 70 | None | 203.07(203.06) |
3o | Colorless liquid | 73 | None | 207.09(207.04) |
3p | Yellow liquid | 72 | None | 266.91(266.96) |
3q | White solid | 57 | 85—87 | 239.01(239.06) |
3r | Yellow solid | 47 | 73—75 | 195.03(195.00) |
3s | Colorless liquid | 61 | None | 203.07(203.06) |
3t | Colorless liquid | 58 | None | 265.07(265.10) |
3u | Colorless liquid | 56 | None | 201.04(201.03) |
3v | Colorless liquid | 61 | None | 215.11(215.06) |
Table 1 Appearance, yields, melting points and GC-MS data for compounds 3a—3v
Compd. | Appearance | Yield*(%) | m. p./℃ | GC-MS(calcd.), m/z[M+H]+ |
---|---|---|---|---|
3a | White solid | 68 | 39—40 | 189.07(189.04) |
3b | White solid | 65 | 55—58 | 203.07(203.06) |
3c | Colorless liquid | 72 | None | 219.10(219.06) |
3d | Colorless liquid | 62 | None | 207.09(207.04) |
3e | White solid | 78 | 55—56 | 223.04(223.01) |
3f | White solid | 61 | 75—76 | 266.91(266.96) |
3g | White solid | 76 | 33—34 | 245.10(245.11) |
3h | Colorless liquid | 62 | None | 234.05(234.03) |
3i | White solid | 67 | 74—77 | 247.04(247.05) |
3j | White solid | 62 | 78—80 | 237.06(237.02) |
3k | Colorless liquid | 60 | None | 223.04(223.01) |
3l | Yellow liquid | 52 | None | 266.91(266.96) |
3m | Colorless liquid | 55 | None | 203.07(203.06) |
3n | Yellow liquid | 70 | None | 203.07(203.06) |
3o | Colorless liquid | 73 | None | 207.09(207.04) |
3p | Yellow liquid | 72 | None | 266.91(266.96) |
3q | White solid | 57 | 85—87 | 239.01(239.06) |
3r | Yellow solid | 47 | 73—75 | 195.03(195.00) |
3s | Colorless liquid | 61 | None | 203.07(203.06) |
3t | Colorless liquid | 58 | None | 265.07(265.10) |
3u | Colorless liquid | 56 | None | 201.04(201.03) |
3v | Colorless liquid | 61 | None | 215.11(215.06) |
Compd. | 1H NMR(400 MHz, CDCl3), δ | 13C NMR(101 MHz, CDCl3), δ | 19F NMR(376 MHz, CDCl3), δ |
---|---|---|---|
3a | 8.02—7.87(m, 2H), 7.70—7.60(m, 1H), 7.59—7.42(m, 2H), 3.81(q, J=10.0 Hz, 2H) | 189.70, 134.18, 133.09, 128.90, 128.30, 123.97(q,J=277.75 Hz), 42.03(q, J=28.2Hz) | -62.04 |
3b | 7.84(d,J=8.2 Hz, 2H), 7.30(d, J=8.3Hz, 2H), 3.77(q, J=10.1 Hz, 2H), 2.44(s, 3H) | 189.29, 145.28, 133.35, 129.57, 128.45, 124.05(q,J=277.75 Hz), 41.92(q, J=28.1 Hz), 21.66 | -62.03 |
3c | 7.93(d, J=8.9 Hz, 2H), 6.98(d, J=8.9 Hz, 2H), 3.90(s, 3H), 3.76(q, J=10.1 Hz, 2H) | 188.11, 164.30, 131.95, 130.77, 124.07(q, J=277.75 Hz), 114.05, 55.55, 41.76(d, J=28.0 Hz) | -61.97 |
3d | 7.98(dd,J=8.8, 5.3 Hz, 2H), 7.19(t, J=8.5 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.11, 166.32(d,J=257.1 Hz), 132.22, 131.12(d, J=9.6 Hz), 123.85(q, J=277.75 Hz), 116.16(d, J=22.2 Hz), 42.07(q, J=28.4 Hz) | -62.04, -102.89 |
3e | 7.88(d, J=8.6 Hz, 2H), 7.49(d, J=8.6 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.53, 140.86, 134.06, 129.73, 129.29, 123.80(q,J=277.75 Hz), 42.11(q, J=28.4 Hz) | -62.01 |
3f | 7.80(d, J=8.5 Hz, 2H), 7.65(d, J=8.5 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.72, 134.44, 132.27, 129.76, 129.62, 123.66(q,J=277.75 Hz), 42.06(q, J=28.5 Hz) | -62.01 |
3g | 7.89(d, J=8.6 Hz, 2H), 7.53(d, J=8.7 Hz, 2H), 3.79(q, J=10.1 Hz, 2H), 1.36(s, 9H) | 189.26, 158.15, 133.25, 129.65, 125.86, 124.10(q,J=277.75 Hz), 41.94(q, J=28.1 Hz), 35.22, 30.95 | -61.99 |
3h | 8.37(d, J=8.9 Hz, 2H), 8.12(d, J=8.9 Hz, 2H), 3.88(q, J=9.7 Hz, 2H) | 188.34, 150.86, 139.89, 129.44, 124.14, 123.51(q,J=278.76 Hz), 42.65(q, J=28.9 Hz) | -61.99 |
3i | 7.89(d,J=8.7 Hz, 2H), 7.20—7.14(m, 2H), 3.71(q, J=10.0 Hz, 2H), 2.26(s, 3H) | 188.52, 168.70, 155.11, 133.24, 131.00, 130.00, 123.88(q, J=277.75 Hz), 122.14, 42.01(q, J=28.3 Hz), 21.06 | -62.04 |
3j | 7.94(d,J=8.3 Hz, 2H), 7.54(d, J=8.2 Hz, 2H), 4.64(s, 2H), 3.82(q, J=10.0 Hz, 2H) | 189.12, 143.57, 135.47, 128.93, 128.74, 123.89(q,J=278.76 Hz), 44.97, 42.08(q, J=28.3 Hz) | -62.03 |
3k | 7.54(d,J=7.7 Hz, 1H), 7.48—7.30(m, 2H), 7.31—7.25(m, 1H), 3.74(q, J=10.0 Hz, 2H) | 193.26, 139.82, 133.89, 132.69, 129.52, 129.10, 127.73, 123.80(q,J=278.76 Hz), 45.71(q, J=28.4 Hz) | -62.14 |
3l | 7.49—7.44(m, 1H), 7.43—7.33(m, 2H), 7.33—7.27(m, 1H), 3.79(q,J=10.0 Hz, 2H) | 192.35, 137.56, 132.95, 131.16, 130.73, 129.66, 127.66, 123.43(q,J=277.75 Hz), 46.06(q, J=28.3 Hz) | -62.22 |
3m | 7.63(d,J=7.8 Hz, 1H), 7.46(t, J=7.4 Hz, 1H), 7.32(t, J=7.7 Hz, 2H), 3.76(q, J=10.1 Hz, 2H), 2.55(s, 3H) | 192.67, 139.54, 135.81, 132.52, 132.45, 131.72, 128.88, 123.49(q,J=277.75 Hz), 44.28(d, J=27.7 Hz), 21.52 | -62.10 |
3n | 7.79—7.70(m, 2H), 7.50—7.34(m, 2H), 3.79(q,J=10.0 Hz, 2H), 2.43(s, 3H) | 189.85, 138.84, 135.80, 134.94, 128.75, 128.74, 125.54,124.03(q, J=277.75 Hz), 42.03(q, J=28.1 Hz), 21.25 | -62.08 |
3o | 7.75—7.69(m, 1H), 7.63(dt, J=9.2, 2.1 Hz, 1H), 7.57—7.46(m, 1H), 7.35(tdd, J=8.2, 2.6, 0.9 Hz, 1H), 3.80(q, J=9.9 Hz, 2H) | 188.55, 162.89(d, J=249.1 Hz), 137.68, 130.68(d, J=7.7 Hz), 124.11(d, J=3.1 Hz), 123.77(q, J=277.75 Hz), 121.31(d, J=21.5 Hz), 115.06(d, J=22.7 Hz), 42.26(q, J=28.6 Hz) | -62.13, -110.94 |
3p | 8.06(s, 1H), 7.86(d,J=9.4 Hz, 1H), 7.77(d, J=9.9 Hz, 1H), 7.40(t, J=7.9 Hz, 1H), 3.79(q, J=9.9 Hz, 2H) | 188.45, 137.36, 137.04, 131.31, 130.48, 126.83, 123.72(q, J=278.76 Hz), 123.27, 42.16(q, J=28.5 Hz) | -62.05 |
3q | 8.40(s, 1H), 8.06—7.85(m, 4H), 7.71—7.54(m, 2H), 3.94(q, J=10.0 Hz, 2H) | 189.59, 135.87, 134.50, 132.24, 130.47, 129.63, 129.14, 128.84, 127.79, 127.13, 124.08(q,J=277.75 Hz), 123.35, 42.04(q, J=28.1 Hz) | -61.88 |
3r | 7.78—7.71(m, 2H), 7.19(dd,J=4.9, 3.9 Hz, 1H), 3.72(q, J=10.1 Hz, 2H) | 182.17, 143.12, 135.71, 133.43, 128.48, 123.62(q,J=278.76 Hz), 42.96(q, J=28.7 Hz) | -61.95 |
3s | 7.96(d,J=7.4 Hz, 2H), 7.64(t, J=7.4 Hz, 1H), 7.52(t, J=7.8 Hz, 2H), 4.40—4.06(m, 1H), 1.48(d, J=7.2 Hz, 3H) | 194.38, 135.6, 133.97, 128.88, 128.56, 125.06(q, J=280.78 Hz), 44.24(q, J=26.5 Hz), 11.67 | -68.29 |
3t | 7.96—7.87(m, 2H), 7.55—7.51(m, 1H), 7.51—7.46(m, 2H), 7.41—7.37(m, 5H), 5.31(q, J=8.2 Hz, 1H) | 191.08, 135.32, 133.77, 129.80, 129.26, 129.17, 128.78, 128.75, 126.86, 124.26(q, J=281.79 Hz), 56.52(q, J=26.6 Hz) | -66.50 |
3u | 7.81(d,J=7.7 Hz, 1H), 7.74—7.63(m, 1H), 7.53(d, J=7.8 Hz, 1H), 7.43(t, J=7.5 Hz, 1H), 3.51—3.37(m, 2H), 3.36—3.26(m, 1H) | 196.82, 152.05, 135.78, 130.87, 128.13, 126.48, 124.89(q,J=279.77 Hz), 124.62, 49.69(q, J=27.4 Hz), 27.53(q, J=2.4 Hz) | -67.75 |
3v | 8.06(dd,J=7.9, 1.1 Hz, 1H), 7.53(td, J=7.5, 1.4 Hz, 1H), 7.35(t, J=7.6 Hz, 1H), 7.28(d, J=7.6 Hz, 1H), 3.38—3.20(m, 1H), 3.17—3.03(m, 2H), 2.51(dq, J=13.7, 4.6 Hz, 1H), 2.27(dddd, J=13.4, 11.9, 10.0, 5.8 Hz, 1H) | 190.20, 143.05, 134.15, 131.85, 128.75, 127.77, 127.04, 125.03(q,J=280.78 Hz), 50.83(q, J=25.6 Hz), 27.49, 23.40(q, J=2.6 Hz) | -67.55 |
Table 2 1H NMR, 13C NMR and 19F NMR data for compounds 3a—3v
Compd. | 1H NMR(400 MHz, CDCl3), δ | 13C NMR(101 MHz, CDCl3), δ | 19F NMR(376 MHz, CDCl3), δ |
---|---|---|---|
3a | 8.02—7.87(m, 2H), 7.70—7.60(m, 1H), 7.59—7.42(m, 2H), 3.81(q, J=10.0 Hz, 2H) | 189.70, 134.18, 133.09, 128.90, 128.30, 123.97(q,J=277.75 Hz), 42.03(q, J=28.2Hz) | -62.04 |
3b | 7.84(d,J=8.2 Hz, 2H), 7.30(d, J=8.3Hz, 2H), 3.77(q, J=10.1 Hz, 2H), 2.44(s, 3H) | 189.29, 145.28, 133.35, 129.57, 128.45, 124.05(q,J=277.75 Hz), 41.92(q, J=28.1 Hz), 21.66 | -62.03 |
3c | 7.93(d, J=8.9 Hz, 2H), 6.98(d, J=8.9 Hz, 2H), 3.90(s, 3H), 3.76(q, J=10.1 Hz, 2H) | 188.11, 164.30, 131.95, 130.77, 124.07(q, J=277.75 Hz), 114.05, 55.55, 41.76(d, J=28.0 Hz) | -61.97 |
3d | 7.98(dd,J=8.8, 5.3 Hz, 2H), 7.19(t, J=8.5 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.11, 166.32(d,J=257.1 Hz), 132.22, 131.12(d, J=9.6 Hz), 123.85(q, J=277.75 Hz), 116.16(d, J=22.2 Hz), 42.07(q, J=28.4 Hz) | -62.04, -102.89 |
3e | 7.88(d, J=8.6 Hz, 2H), 7.49(d, J=8.6 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.53, 140.86, 134.06, 129.73, 129.29, 123.80(q,J=277.75 Hz), 42.11(q, J=28.4 Hz) | -62.01 |
3f | 7.80(d, J=8.5 Hz, 2H), 7.65(d, J=8.5 Hz, 2H), 3.78(q, J=9.9 Hz, 2H) | 188.72, 134.44, 132.27, 129.76, 129.62, 123.66(q,J=277.75 Hz), 42.06(q, J=28.5 Hz) | -62.01 |
3g | 7.89(d, J=8.6 Hz, 2H), 7.53(d, J=8.7 Hz, 2H), 3.79(q, J=10.1 Hz, 2H), 1.36(s, 9H) | 189.26, 158.15, 133.25, 129.65, 125.86, 124.10(q,J=277.75 Hz), 41.94(q, J=28.1 Hz), 35.22, 30.95 | -61.99 |
3h | 8.37(d, J=8.9 Hz, 2H), 8.12(d, J=8.9 Hz, 2H), 3.88(q, J=9.7 Hz, 2H) | 188.34, 150.86, 139.89, 129.44, 124.14, 123.51(q,J=278.76 Hz), 42.65(q, J=28.9 Hz) | -61.99 |
3i | 7.89(d,J=8.7 Hz, 2H), 7.20—7.14(m, 2H), 3.71(q, J=10.0 Hz, 2H), 2.26(s, 3H) | 188.52, 168.70, 155.11, 133.24, 131.00, 130.00, 123.88(q, J=277.75 Hz), 122.14, 42.01(q, J=28.3 Hz), 21.06 | -62.04 |
3j | 7.94(d,J=8.3 Hz, 2H), 7.54(d, J=8.2 Hz, 2H), 4.64(s, 2H), 3.82(q, J=10.0 Hz, 2H) | 189.12, 143.57, 135.47, 128.93, 128.74, 123.89(q,J=278.76 Hz), 44.97, 42.08(q, J=28.3 Hz) | -62.03 |
3k | 7.54(d,J=7.7 Hz, 1H), 7.48—7.30(m, 2H), 7.31—7.25(m, 1H), 3.74(q, J=10.0 Hz, 2H) | 193.26, 139.82, 133.89, 132.69, 129.52, 129.10, 127.73, 123.80(q,J=278.76 Hz), 45.71(q, J=28.4 Hz) | -62.14 |
3l | 7.49—7.44(m, 1H), 7.43—7.33(m, 2H), 7.33—7.27(m, 1H), 3.79(q,J=10.0 Hz, 2H) | 192.35, 137.56, 132.95, 131.16, 130.73, 129.66, 127.66, 123.43(q,J=277.75 Hz), 46.06(q, J=28.3 Hz) | -62.22 |
3m | 7.63(d,J=7.8 Hz, 1H), 7.46(t, J=7.4 Hz, 1H), 7.32(t, J=7.7 Hz, 2H), 3.76(q, J=10.1 Hz, 2H), 2.55(s, 3H) | 192.67, 139.54, 135.81, 132.52, 132.45, 131.72, 128.88, 123.49(q,J=277.75 Hz), 44.28(d, J=27.7 Hz), 21.52 | -62.10 |
3n | 7.79—7.70(m, 2H), 7.50—7.34(m, 2H), 3.79(q,J=10.0 Hz, 2H), 2.43(s, 3H) | 189.85, 138.84, 135.80, 134.94, 128.75, 128.74, 125.54,124.03(q, J=277.75 Hz), 42.03(q, J=28.1 Hz), 21.25 | -62.08 |
3o | 7.75—7.69(m, 1H), 7.63(dt, J=9.2, 2.1 Hz, 1H), 7.57—7.46(m, 1H), 7.35(tdd, J=8.2, 2.6, 0.9 Hz, 1H), 3.80(q, J=9.9 Hz, 2H) | 188.55, 162.89(d, J=249.1 Hz), 137.68, 130.68(d, J=7.7 Hz), 124.11(d, J=3.1 Hz), 123.77(q, J=277.75 Hz), 121.31(d, J=21.5 Hz), 115.06(d, J=22.7 Hz), 42.26(q, J=28.6 Hz) | -62.13, -110.94 |
3p | 8.06(s, 1H), 7.86(d,J=9.4 Hz, 1H), 7.77(d, J=9.9 Hz, 1H), 7.40(t, J=7.9 Hz, 1H), 3.79(q, J=9.9 Hz, 2H) | 188.45, 137.36, 137.04, 131.31, 130.48, 126.83, 123.72(q, J=278.76 Hz), 123.27, 42.16(q, J=28.5 Hz) | -62.05 |
3q | 8.40(s, 1H), 8.06—7.85(m, 4H), 7.71—7.54(m, 2H), 3.94(q, J=10.0 Hz, 2H) | 189.59, 135.87, 134.50, 132.24, 130.47, 129.63, 129.14, 128.84, 127.79, 127.13, 124.08(q,J=277.75 Hz), 123.35, 42.04(q, J=28.1 Hz) | -61.88 |
3r | 7.78—7.71(m, 2H), 7.19(dd,J=4.9, 3.9 Hz, 1H), 3.72(q, J=10.1 Hz, 2H) | 182.17, 143.12, 135.71, 133.43, 128.48, 123.62(q,J=278.76 Hz), 42.96(q, J=28.7 Hz) | -61.95 |
3s | 7.96(d,J=7.4 Hz, 2H), 7.64(t, J=7.4 Hz, 1H), 7.52(t, J=7.8 Hz, 2H), 4.40—4.06(m, 1H), 1.48(d, J=7.2 Hz, 3H) | 194.38, 135.6, 133.97, 128.88, 128.56, 125.06(q, J=280.78 Hz), 44.24(q, J=26.5 Hz), 11.67 | -68.29 |
3t | 7.96—7.87(m, 2H), 7.55—7.51(m, 1H), 7.51—7.46(m, 2H), 7.41—7.37(m, 5H), 5.31(q, J=8.2 Hz, 1H) | 191.08, 135.32, 133.77, 129.80, 129.26, 129.17, 128.78, 128.75, 126.86, 124.26(q, J=281.79 Hz), 56.52(q, J=26.6 Hz) | -66.50 |
3u | 7.81(d,J=7.7 Hz, 1H), 7.74—7.63(m, 1H), 7.53(d, J=7.8 Hz, 1H), 7.43(t, J=7.5 Hz, 1H), 3.51—3.37(m, 2H), 3.36—3.26(m, 1H) | 196.82, 152.05, 135.78, 130.87, 128.13, 126.48, 124.89(q,J=279.77 Hz), 124.62, 49.69(q, J=27.4 Hz), 27.53(q, J=2.4 Hz) | -67.75 |
3v | 8.06(dd,J=7.9, 1.1 Hz, 1H), 7.53(td, J=7.5, 1.4 Hz, 1H), 7.35(t, J=7.6 Hz, 1H), 7.28(d, J=7.6 Hz, 1H), 3.38—3.20(m, 1H), 3.17—3.03(m, 2H), 2.51(dq, J=13.7, 4.6 Hz, 1H), 2.27(dddd, J=13.4, 11.9, 10.0, 5.8 Hz, 1H) | 190.20, 143.05, 134.15, 131.85, 128.75, 127.77, 127.04, 125.03(q,J=280.78 Hz), 50.83(q, J=25.6 Hz), 27.49, 23.40(q, J=2.6 Hz) | -67.55 |
Entry | Catalyst | Oxidant | Solvent | Reaction time/h | Yieldb(%) |
---|---|---|---|---|---|
1 | Rhodamine B | TBHP | DMF | 15 | 11 |
2 | Eosin Y | TBHP | DMF | 15 | 13 |
3 | Ru(bpy)3Cl2 | TBHP | DMF | 15 | 0 |
4 | Mes-Acr-Me+ClO4 | TBHP | DMF | 15 | 5 |
5 | Rose bengal | TBHP | DMF | 15 | Trace |
6 | Fluorescein | TBHP | DMF | 15 | 9 |
7 | 2,3-Butanedione | TBHP | DMF | 15 | 23 |
8 | 2,3-Butanedione | TBHP | DCM | 15 | 0 |
9 | 2,3-Butanedione | TBHP | MeCN | 15 | 36 |
10 | 2,3-Butanedione | TBHP | Acetone | 15 | 28 |
11 | 2,3-Butanedione | TBHP | EtOAc | 15 | 17 |
12 | 2,3-Butanedione | TBHP | THF | 15 | 21 |
13 | 2,3-Butanedione | TBHP | 1,4-Dioxane | 15 | 0 |
14 | 2,3-Butanedione | TBHP | V(MeCN):V(DMF)=1:1 | 15 | 50 |
15c | 2,3-Butanedione | — | V(MeCN):V(DMF)=1:1 | 15 | 29 |
16 | 2,3-Butanedione | K2S2O8 | V(MeCN):V(DMF)=1:1 | 15 | 35 |
17d | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 15 | 62 |
18e | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 68 |
19f | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 0 |
20g | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 0 |
Table 3 Conditions optimization of model reactiona
Entry | Catalyst | Oxidant | Solvent | Reaction time/h | Yieldb(%) |
---|---|---|---|---|---|
1 | Rhodamine B | TBHP | DMF | 15 | 11 |
2 | Eosin Y | TBHP | DMF | 15 | 13 |
3 | Ru(bpy)3Cl2 | TBHP | DMF | 15 | 0 |
4 | Mes-Acr-Me+ClO4 | TBHP | DMF | 15 | 5 |
5 | Rose bengal | TBHP | DMF | 15 | Trace |
6 | Fluorescein | TBHP | DMF | 15 | 9 |
7 | 2,3-Butanedione | TBHP | DMF | 15 | 23 |
8 | 2,3-Butanedione | TBHP | DCM | 15 | 0 |
9 | 2,3-Butanedione | TBHP | MeCN | 15 | 36 |
10 | 2,3-Butanedione | TBHP | Acetone | 15 | 28 |
11 | 2,3-Butanedione | TBHP | EtOAc | 15 | 17 |
12 | 2,3-Butanedione | TBHP | THF | 15 | 21 |
13 | 2,3-Butanedione | TBHP | 1,4-Dioxane | 15 | 0 |
14 | 2,3-Butanedione | TBHP | V(MeCN):V(DMF)=1:1 | 15 | 50 |
15c | 2,3-Butanedione | — | V(MeCN):V(DMF)=1:1 | 15 | 29 |
16 | 2,3-Butanedione | K2S2O8 | V(MeCN):V(DMF)=1:1 | 15 | 35 |
17d | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 15 | 62 |
18e | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 68 |
19f | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 0 |
20g | 2,3-Butanedione | H2O2 | V(MeCN):V(DMF)=1:1 | 18 | 0 |
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