反应详情

The procedure used in Example 1: step c was followed using {[4-(3-bromo-benzenesulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester (Example 27 (50 mg, 0.1 mmol)), 4-methyl-2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzoic acid tert-butyl ester ((Example 4: step b) 127 mg, 0.4 mmol), Na2CO3 (2M, 0.8 mL, 1.6 mmol), Pd(PPh3)4 (29.4 mg, 0.025 mmol), ethanol (0.8 mL) and toluene (1.6 mL). Analogous aqueous workup and purification of the crude material by preparative TLC (25% EtOAc in hexanes) yielded the title compound (35 mg, 58%) as a light-yellow glass. 1H-NMR (CDCl3): δ 8.01 (ddd, 1H, J=1.2, 1.9, 7.9 Hz), 7.92 (s, 1H), 7.83 (t, 1H, J=1.7 Hz), 7.65 (m, 1H), 7.56 (t, 1H, J=7.8 Hz), 7.43 (dt, 1H, J=1.4, 7.7 Hz), 7.36 (m, 2H), 2.58 (s, 3H), 2.00 (s, 3H), 1.51 (s, 9H). ESI-MS (m/z): Calcd. for C29H34N2O6S3: 602.8; found: 602.9.

1. customAnalogous aqueous workup and purification of the crude material by preparative TLC (25% EtOAc in hexanes)