4-[(R)-3-ethoxycarbonyl-2-oxo-5-phenyl-imidazolidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester 、
三氟乙酸 以
二氯甲烷 为溶剂,
以to give (R)-2-oxo-4-phenyl-3-piperidin-4-yl-imidazolidine-1-carboxylic acid ethyl ester (141 mg, 100%)的产率得到(R)-2-oxo-4-phenyl-3-piperidin-4-yl-imidazolidine-1-carboxylic acid ethyl ester