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)succinamic acid benzyl ester, N-(2-benzyloxycarbonyloxy-1(S)-phenyl-ethyl)-3(R)-(t-butoxycarbonylamino)succinamic acid benzyl ester and 2,5-dimethoxy-3-(4-pyridin-4-yl-phenyl)-tetrahydrofuran (prepared as described in Example 5(a)) were condensed in wet 1,2-dichloroethane at 80-90° C. after 18 hours. Flash column chromatagraphy with 4% MeOH/CH2Cl2 as eluant gave 140 mg (56%) of N-(2-benzyloxycarbonyloxy-1(S)-phenylethyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid benzyl ester as a yellow solid, mp 138-40° C.