反应详情

A mixture of N2-(2-chlorophenyl)-N2-methyl-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2,9-dicarboxamide 119 (70 mg), TFA (37.5 μL), triethylsilane (80 μL) and acetaldehyde (28 μL) in dry MeCN (Dube et al (1999) Tet. Letters 40(12):2295-2298) was stirred at room temperature overnight then concentrated in vacuo. Purification on silica yielded 300. NMR: (CDCl3 δ 7.19 ppm): 1.21 (t, 3H, CH3, J=7.28 Hz), 2.93 (t, 2H, CH2, J=5.07 Hz), 3.32 (s, 3H, CH3), 3.43 (m, 2H, CH2), 4.17 (t, 2H, CH2, J=5.10 Hz), 5.94 (m, H, NH), 6.59 (s, H, ArH), 6.91 (d, H, ArH, J=8.41 Hz), 7.29-7.36 (m, 3H, 3×ArH), 7.44-7.47 (m, 2H, 2×ArH), 7.81 (m, H, ArH). MS: (ESI+) MH+ 482.15

1. concentrationthen concentrated in vacuo
2. customPurification on silica