反应详情

According to the procedure described in Example 1(b) for the preparation of N-(2,2-dimethyl-1(S)-methylcarbamoylpropyl)-3(R)-(3-phenyl-1H-pyrrol-1-yl)succinarnic acid benzyl ester, 3(R)-t-butoxycarbonylamino-N-(2,2-dimethyl-1(S)-methylcarbamoylpropyl)succinamic acid benzyl ester was deprotected. The crude amine salt and crude 3-(4′-carboxamidobiphenyl-4-yl)-2,5-dimethoxy-tetrahydrofuran (prepared as described in Example 4(b)) were condensed in wet 1,2-dichloroethane at 90-100° C. to yield 180 mg (55%) of 3(R)-[3-(4′-carbamoylbiphenyl-4-yl)-1H-pyrrol-1-yl]-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester. 1H NMR: δ 7.90 (d, 2H, J=8.4Hz), 7.70 (d, 2H, J=8.7 Hz), 7.60 (dd, 3H, J=8.7, 11.5 Hz), 7.38-7.22 (m, 8H), 7.10 (t, 1H, J=2.2 Hz), 6.82 (t, 1H, J=2.5 Hz), 6.62 (t, 1H, J=3.0 Hz), 6.32 (d, 1H, J=9.0Hz), 5.63 (d, 1H, J=4.70 Hz), 5.14 (d, 3H, J=3.7 Hz), 4.00 (d, 1H, J=8.7 Hz), 3.48 (dd, 1H, J=7.2, 13.1 Hz), 3.39 (d, 1H, J=5.9 Hz), 3.14 (dd, 1H, J=8.7, 16.8 Hz), 2.78 (d, 3H, J=4.7 Hz), 0.92 (s, 9H). IR (KBr): 3356, 2929, 1735, 1657, 1402 cm−1. Anal. Calculated for C35H39N4O5•0.5 H2O: C, 69.63; H, 6.51; N, 9.28. Found: C, 69.85, H, 6.46; N, 9.14.