(E)-(S)-4-Amino-5-(tert-butyl-dimethyl-silanyloxy)-2-methyl-pent-2-enoic acid allyl ester 、
(S)-Pyrrolidine-1,2-dicarboxylic acid 2-((1S,3S,5S,6S)-1-tert-butyl-5-hydroxy-3-methyl-6-thiocarboxy-heptyl) ester 1-(9H-fluoren-9-ylmethyl) ester 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以82%的产率得到(S)-Pyrrolidine-1,2-dicarboxylic acid 2-{(1S,3S,5S,6S)-6-[(E)-(S)-3-allyloxycarbonyl-1-(tert-butyl-dimethyl-silanyloxymethyl)-but-2-enylcarbamoyl]-1-tert-butyl-5-hydroxy-3-methyl-heptyl} ester 1-(9H-fluoren-9-ylmethyl) ester