(2S,5R)-5-carbamoyl-4-[4-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-4-oxo-butyl]-2-methyl-3-oxo-piperazine-1-carboxylic acid benzyl ester 、
2-chloro-4-isocyanato-1-(trifluoromethyl)benzene 在
钯 作用下,
以to give the titled compound in 73% yield as a colorless solid的产率得到(3R,6S)-N1-(3-chloro-4-(trifluoromethyl)phenyl)-4-(4-((S)-4-hydroxy-6-azaspiro[2.5]octan-6-yl)-4-oxobutyl)-6-methyl-5-oxopiperazine-1,3-dicarboxamide