反应详情

L-Phenylalanine hydrochloride (1.75 mmoles, 380 mg), diisopropylethylamine (1.93 mmoles, 0.34 ml), 2-[5-[2-(2H-tetrazol-5-yl)phenyl]-1H-benzimidazol-1-yl]octanoic acid (1.24 mmoles, 0.50 g), hydroxybenzotriazole (1.36 mmoles 187 mg) and dicyclohexylcarbodiimide (1.36 mmoles, 280 mg) were reacted as in Example 37. The stereoisomers were separated by chromatography over silica gel eluted with 2% methanol in chloroform. The isomers were hydrolyzed as in Example 37 to yield N-[1-oxo-2-[5-[2-(2H-tetrazole-5-yl]phenyl]-1H-benzimidazol-1-yl]octyl]-L-phenylalanine.

1. customThe stereoisomers were separated by chromatography over silica gel
2. washeluted with 2% methanol in chloroform