Process for the preparation of intermediate compounds of (1r,5s)-n-3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl-3-2(s)-(1,1-dimethylethy)aminocarbonylamino-3,3-dimethyl-1-oxobutyl-6,6-dimethyl-3-azabicyclo3.1.0hexan-2(s)-carboxamide

摘要

The present invention relates to a process for the preparation of intermediate compounds of(lR,5S)-N-[3-amino-l-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[2(S)-[[[(l,l-dimethylethyl) amino]carbonyl]amino]-3,3-dimethyl-l-oxobutyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexan-2(S)-carboxamide represented by structural formula-A.