(S)-6-tert-Butoxycarbonylamino-2-(9H-fluoren-9-ylmethoxycarbonylamino)-hexanethioic acid S-pyridin-2-yl ester 、 alkaline earth salt of/the/ methylsulfuric acid 以
四氢呋喃 为溶剂,
反应 3.0h,
以49%的产率得到[(S)-5-(9H-Fluoren-9-ylmethoxycarbonylamino)-6-oxo-6-phenyl-hexyl]-carbamic acid tert-butyl ester