Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (3): 20210707.doi: 10.7503/cjcu20210707
• Organic Chemistry • Previous Articles Next Articles
WU Fengtian1(), LI Jun1, SUN Yijia1, ZENG Rong1, REN Han1, LIU Xiuping1, ZHANG Caihong1, YAN Fangming1, WU Ling1, CUI Chunna2
Received:
2021-10-08
Online:
2022-03-10
Published:
2021-11-04
Contact:
WU Fengtian
E-mail:201860115@ecut.edu.cn
Supported by:
CLC Number:
TrendMD:
WU Fengtian, LI Jun, SUN Yijia, ZENG Rong, REN Han, LIU Xiuping, ZHANG Caihong, YAN Fangming, WU Ling, CUI Chunna. Fibroin Assisted Copper-promoted C-N Coupling Reaction[J]. Chem. J. Chinese Universities, 2022, 43(3): 20210707.
Compd. | Appearance | Isolated yield(%) | m. p./℃ | Compd. | Appearance | Isolated yield(%) | m. p./℃ |
---|---|---|---|---|---|---|---|
3a | White solid | 92, 82, 62(I, Br, Cl) | 63—64 | 3j | White solid | 63(I) | 93—95 |
3b | Colorless oil | 83, 72, 49(I, Br, Cl) | — | 3k | White solid | 68(I) | 145—146 |
3c | White solid | 91, 84(I, Br) | 119—121 | 3l | Light yellow solid | 71(I) | 110—111 |
3d | White solid | 88, 62(I, Br) | 61—62 | 3m | White solid | 64(I) | 206—207 |
3e | Light yellow solid | 94, 84, 68(I, Br, Cl) | 59—62 | 3n | Grey solid | 78(I) | 82—83 |
3f | White solid | 87, 59(I, Br) | 156—157 | 3o | Colorless oil | 76(I) | — |
3g | White solid | 83(I) | 53—54 | 3p | White solid | 85(I) | 93—94 |
3h | Colorless oil | 72(I) | — | 3q | Grey solid | 88(I) | 189—190 |
3i | White solid | 67(I) | 87—89 | 3r | White solid | 82(Cl) | 126—128 |
Table 1 Appearance, yields and melting point data of target compounds 3a—3l
Compd. | Appearance | Isolated yield(%) | m. p./℃ | Compd. | Appearance | Isolated yield(%) | m. p./℃ |
---|---|---|---|---|---|---|---|
3a | White solid | 92, 82, 62(I, Br, Cl) | 63—64 | 3j | White solid | 63(I) | 93—95 |
3b | Colorless oil | 83, 72, 49(I, Br, Cl) | — | 3k | White solid | 68(I) | 145—146 |
3c | White solid | 91, 84(I, Br) | 119—121 | 3l | Light yellow solid | 71(I) | 110—111 |
3d | White solid | 88, 62(I, Br) | 61—62 | 3m | White solid | 64(I) | 206—207 |
3e | Light yellow solid | 94, 84, 68(I, Br, Cl) | 59—62 | 3n | Grey solid | 78(I) | 82—83 |
3f | White solid | 87, 59(I, Br) | 156—157 | 3o | Colorless oil | 76(I) | — |
3g | White solid | 83(I) | 53—54 | 3p | White solid | 85(I) | 93—94 |
3h | Colorless oil | 72(I) | — | 3q | Grey solid | 88(I) | 189—190 |
3i | White solid | 67(I) | 87—89 | 3r | White solid | 82(Cl) | 126—128 |
Compd. | 1H NMR (400 MHz, CDCl3 or DMSO?d6), δ | GC?MS, [M]+, m/z | |
---|---|---|---|
3a | 7.82(s, 1H), 7.25—7.27(m, 3H), 7.19(s, 1H), 7.06—7.08(m, 1H), 6.80—6.82(m, 1H) | 158 | |
3b | 7.89(s, 1H), 7.30—7.38(m, 2H), 7.15—7.20(m, 4H) | 158 | |
3c | 8.29(s, 1H), 7.76—7378(m, 3H), 7.67—7.72(m, 4H), 7.43—7.47(m, 2H), 7.33—7.37(m, 1H), 7.11(s, 1H) | 220 | |
3d | 8.04—8.06(m, 2H), 7.94(s, 1H), 7.52—7.62(m, 5H), 7.45—7.47(m, 1H), 7.18(s,1H) | 194 | |
3e | 7.74(s, 1H), 7.27—7.28(m, 2H), 7.15—7.17(m, 2H), 6.94—6.98(m, 2H), 3.82(s, 3H) | 174 | |
3f | 7.84(s, 1H), 7.25(s, 1H), 7.18(s, 1H), 7.00(m, 3H) | 172 | |
3g | 7.81(s, 1H), 7.41—7.46(m, 2H), 7.30—7.35(m, 3H), 7.24(s, 1H), 7.17 ppm(s, 1H) | 144 | |
3h | 7.33—7.36(m, 4H), 7.13—7.17(m, 3H) | 162 | |
3i | 8.25(s, 1H), 7.73(s, 1H), 7.64—7.68(m, 3H), 7.52—7.56(m, 2H), 7.09(s, 1H) | 178 | |
3g | 8.18(s, 1H), 7.63—7.68(m, 3H), 7.29—7.36(m, 2H), 7.07(s, 1H) | 221 | |
3k | 8.18(s, 1H), 7.63—7.68(m, 3H), 7.29—7.36(m, 2H), 7.07(s, 1H) | 269 | |
3l | 8.07(s, 2H), 7.58(s, 1H), 7.37—7.39(m, 2H), 7.07(s, 1H), 6.84—6.86(m, 2H) | 186 | |
3m | 8.37—8.41(m, 2H), 7.99(s, 1H), 7.57—7.60(m, 2H), 7.38(s, 1H), 7.29(s, 1H) | 189 | |
3n | 7.42—7.44(m, 2H), 7.21—7.22(m, 2H), 7.17—7.19(m, 2H) | 150 | |
3o | 7.19(d, J = 6.4 Hz, 2H), 7.09(d, J = 6.4 Hz, 2H), 6.98(s, 1H), 6.94(s, 1H), 2.34(s, 3H), 2.26(s, 3H) | 172 | |
3p | 7.98(s, 1H), 7.74—7.75(m, 1H), 7.38—7.39(m, 1H), 7.12—7.26(m, 5H), 2.31(s, 3H) | 194 | |
3q | 11.51(s, 1H), 7.84—7.86(m, 1H), 7.43—7.47(m, 2H), 7.38—7.40(m, 1H), 7.28—7.32(m, 1H), 7.07—7.10(m, 1H), 6.96—7.00(m, 1H), 6.89(s, 1H) | 193 | |
3r | 8.64(s, 2H), 7.84(d, J = 8.0 Hz, 2H), 7.31—7.45(m, 8H), 5.65(s, 2H) | 235 |
Table 2 1H NMR and MS data of target compounds 3a—3r
Compd. | 1H NMR (400 MHz, CDCl3 or DMSO?d6), δ | GC?MS, [M]+, m/z | |
---|---|---|---|
3a | 7.82(s, 1H), 7.25—7.27(m, 3H), 7.19(s, 1H), 7.06—7.08(m, 1H), 6.80—6.82(m, 1H) | 158 | |
3b | 7.89(s, 1H), 7.30—7.38(m, 2H), 7.15—7.20(m, 4H) | 158 | |
3c | 8.29(s, 1H), 7.76—7378(m, 3H), 7.67—7.72(m, 4H), 7.43—7.47(m, 2H), 7.33—7.37(m, 1H), 7.11(s, 1H) | 220 | |
3d | 8.04—8.06(m, 2H), 7.94(s, 1H), 7.52—7.62(m, 5H), 7.45—7.47(m, 1H), 7.18(s,1H) | 194 | |
3e | 7.74(s, 1H), 7.27—7.28(m, 2H), 7.15—7.17(m, 2H), 6.94—6.98(m, 2H), 3.82(s, 3H) | 174 | |
3f | 7.84(s, 1H), 7.25(s, 1H), 7.18(s, 1H), 7.00(m, 3H) | 172 | |
3g | 7.81(s, 1H), 7.41—7.46(m, 2H), 7.30—7.35(m, 3H), 7.24(s, 1H), 7.17 ppm(s, 1H) | 144 | |
3h | 7.33—7.36(m, 4H), 7.13—7.17(m, 3H) | 162 | |
3i | 8.25(s, 1H), 7.73(s, 1H), 7.64—7.68(m, 3H), 7.52—7.56(m, 2H), 7.09(s, 1H) | 178 | |
3g | 8.18(s, 1H), 7.63—7.68(m, 3H), 7.29—7.36(m, 2H), 7.07(s, 1H) | 221 | |
3k | 8.18(s, 1H), 7.63—7.68(m, 3H), 7.29—7.36(m, 2H), 7.07(s, 1H) | 269 | |
3l | 8.07(s, 2H), 7.58(s, 1H), 7.37—7.39(m, 2H), 7.07(s, 1H), 6.84—6.86(m, 2H) | 186 | |
3m | 8.37—8.41(m, 2H), 7.99(s, 1H), 7.57—7.60(m, 2H), 7.38(s, 1H), 7.29(s, 1H) | 189 | |
3n | 7.42—7.44(m, 2H), 7.21—7.22(m, 2H), 7.17—7.19(m, 2H) | 150 | |
3o | 7.19(d, J = 6.4 Hz, 2H), 7.09(d, J = 6.4 Hz, 2H), 6.98(s, 1H), 6.94(s, 1H), 2.34(s, 3H), 2.26(s, 3H) | 172 | |
3p | 7.98(s, 1H), 7.74—7.75(m, 1H), 7.38—7.39(m, 1H), 7.12—7.26(m, 5H), 2.31(s, 3H) | 194 | |
3q | 11.51(s, 1H), 7.84—7.86(m, 1H), 7.43—7.47(m, 2H), 7.38—7.40(m, 1H), 7.28—7.32(m, 1H), 7.07—7.10(m, 1H), 6.96—7.00(m, 1H), 6.89(s, 1H) | 193 | |
3r | 8.64(s, 2H), 7.84(d, J = 8.0 Hz, 2H), 7.31—7.45(m, 8H), 5.65(s, 2H) | 235 |
Entry | Copper salt | Ligand | Base | Solvent | Yield(%) b |
---|---|---|---|---|---|
1 | CuI | Fibroin | Na2CO3 | DMSO | 62 |
2 | CuBr | Fibroin | Na2CO3 | DMSO | 57 |
3 | Cu | Fibroin | Na2CO3 | DMSO | 12 |
4 | CuCl | Fibroin | Na2CO3 | DMSO | 49 |
5 | CuO | Fibroin | Na2CO3 | DMSO | 18 |
6 | CuBr2 | Fibroin | Na2CO3 | DMSO | 36 |
7 | CuCl2 | Fibroin | Na2CO3 | DMSO | 54 |
8 | CuSO4 | Fibroin | Na2CO3 | DMSO | 42 |
9 | Cu(OAc)2 | Fibroin | Na2CO3 | DMSO | 46 |
10 | Cu(NO3)2 | Fibroin | Na2CO3 | DMSO | 36 |
11 | CuI | L?Proline | Na2CO3 | DMSO | 84 |
12 | CuI | Glycine | Na2CO3 | DMSO | 75 |
13 | CuI | L?Alanine | Na2CO3 | DMSO | 72 |
14 | CuI | Tryptophan | Na2CO3 | DMSO | 59 |
15 | CuI | Fibroin | KOH | DMSO | 92, 54c, 86 d |
16 | CuI | Fibroin | K3PO4 | DMSO | 67 |
17 | CuI | Fibroin | K2CO3 | DMSO | 76 |
18 | CuI | Fibroin | Na3PO4 | DMSO | 64 |
19 | CuI | Fibroin | Cs2CO3 | DMSO | 88 |
20 | CuI | Fibroin | KOH | DMF | 77 |
21 | CuI | Fibroin | KOH | 1,4?Dioxane | 82 |
22 | CuI | Fibroin | KOH | Glycerol | 68 |
23 | CuI | Fibroin | KOH | Toluene | 56 |
24 | CuI | Fibroin | KOH | Cycloheptane | 48 |
25 e | CuI | Fibroin | KOH | DMSO | 73 |
26 f | CuI | Fibroin | KOH | DMSO | 66 |
27 g | CuI | Fibroin | KOH | DMSO | 94 |
28 h | CuI | Fibroin | KOH | DMSO | 71 |
Table 3 Optimization of reaction conditions a
Entry | Copper salt | Ligand | Base | Solvent | Yield(%) b |
---|---|---|---|---|---|
1 | CuI | Fibroin | Na2CO3 | DMSO | 62 |
2 | CuBr | Fibroin | Na2CO3 | DMSO | 57 |
3 | Cu | Fibroin | Na2CO3 | DMSO | 12 |
4 | CuCl | Fibroin | Na2CO3 | DMSO | 49 |
5 | CuO | Fibroin | Na2CO3 | DMSO | 18 |
6 | CuBr2 | Fibroin | Na2CO3 | DMSO | 36 |
7 | CuCl2 | Fibroin | Na2CO3 | DMSO | 54 |
8 | CuSO4 | Fibroin | Na2CO3 | DMSO | 42 |
9 | Cu(OAc)2 | Fibroin | Na2CO3 | DMSO | 46 |
10 | Cu(NO3)2 | Fibroin | Na2CO3 | DMSO | 36 |
11 | CuI | L?Proline | Na2CO3 | DMSO | 84 |
12 | CuI | Glycine | Na2CO3 | DMSO | 75 |
13 | CuI | L?Alanine | Na2CO3 | DMSO | 72 |
14 | CuI | Tryptophan | Na2CO3 | DMSO | 59 |
15 | CuI | Fibroin | KOH | DMSO | 92, 54c, 86 d |
16 | CuI | Fibroin | K3PO4 | DMSO | 67 |
17 | CuI | Fibroin | K2CO3 | DMSO | 76 |
18 | CuI | Fibroin | Na3PO4 | DMSO | 64 |
19 | CuI | Fibroin | Cs2CO3 | DMSO | 88 |
20 | CuI | Fibroin | KOH | DMF | 77 |
21 | CuI | Fibroin | KOH | 1,4?Dioxane | 82 |
22 | CuI | Fibroin | KOH | Glycerol | 68 |
23 | CuI | Fibroin | KOH | Toluene | 56 |
24 | CuI | Fibroin | KOH | Cycloheptane | 48 |
25 e | CuI | Fibroin | KOH | DMSO | 73 |
26 f | CuI | Fibroin | KOH | DMSO | 66 |
27 g | CuI | Fibroin | KOH | DMSO | 94 |
28 h | CuI | Fibroin | KOH | DMSO | 71 |
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