4-[cyclopropyl-(4-oxazol-5-yl-benzoyl)-amino]-3-fluoro-piperidine-1-carboxylic acid tert-butyl ester 在
column Daicel OJ-H, 250 x 4.6 mm 作用下,
以
甲醇 、
二乙胺 为溶剂,
生成 (3S,4S)-4-[cyclopropyl-(4-oxazol-5-yl-benzoyl)-amino]-3-fluoro-piperidine-1-carboxylic acid tert-butyl ester 、 (3R,4R)-4-[cyclopropyl-(4-oxazol-5-yl-benzoyl)-amino]-3-fluoro-piperidine-1-carboxylic acid tert-butyl ester 、 (3R,4S)-4-[cyclopropyl-(4-oxazol-5-yl-benzoyl)-amino]-3-fluoro-piperidine-1-carboxylic acid tert-butyl ester 、 (3S,4R)-4-[cyclopropyl-(4-oxazol-5-yl-benzoyl)-amino]-3-fluoro-piperidine-1-carboxylic acid tert-butyl ester