(S)-吡咯烷-2-腈 、
(2S,4R)-1-(4-(benzyloxy)-3,5-dimethoxybenzoyl)-4-methoxy-pyrrolidine-2-carboxylic acid 以affords 10 mg (0.02 mmol) of final product的产率得到(S)-1-((2S,4R)-1-(4-(benzyloxy)-3,5-dimethoxybenzoyl)-4-methoxypyrrolidine-2-carbonyl)pyrrolidine-2-carbonitrile