Methanesulfonic acid (2S,3R)-3-{4-[(3R,4R,5S)-3,4-bis-benzyloxy-5-(tert-butyl-diphenyl-silanyloxymethyl)-pyrrolidin-(2E)-ylidene]-5-oxo-4,5-dihydro-oxazol-2-yl}-2,3-dihydroxy-2-methyl-propyl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以84%的产率得到4-[(3R,4R,5S)-3,4-Bis-benzyloxy-5-(tert-butyl-diphenyl-silanyloxymethyl)-pyrrolidin-(2E)-ylidene]-2-[(R)-hydroxy-((S)-2-methyl-oxiranyl)-methyl]-4H-oxazol-5-one