(S)-Pyrrolidine-1,2-dicarboxylic acid 2-[(1S,3S,5S,6S)-6-((E)-(S)-3-allyloxycarbonyl-1-hydroxymethyl-but-2-enylcarbamoyl)-1-tert-butyl-5-hydroxy-3-methyl-heptyl] ester 1-(9H-fluoren-9-ylmethyl) ester 在
二乙胺基三氟化硫 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以90%的产率得到(S)-Pyrrolidine-1,2-dicarboxylic acid 2-{(1S,3S,5S,6S)-6-[(S)-4-((E)-2-allyloxycarbonyl-propenyl)-4,5-dihydro-oxazol-2-yl]-1-tert-butyl-5-hydroxy-3-methyl-heptyl} ester 1-(9H-fluoren-9-ylmethyl) ester