(1S,3R)-3-Methylamino-cyclopentanecarboxylic acid 9H-fluoren-9-ylmethyl ester; compound with trifluoro-acetic acid 、
BOC-L-亮氨酸 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以737 mg的产率得到(1S,3R)-3-[((S)-2-tert-Butoxycarbonylamino-4-methyl-pentanoyl)-methyl-amino]-cyclopentanecarboxylic acid 9H-fluoren-9-ylmethyl ester