(1H-Imidazol-2-yl)-carbamic acid allyl ester 、
(4S,5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-hydroxymethyl-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester 在
三苯基膦 、
偶氮二甲酸二乙酯 作用下,
以
甲苯 为溶剂,
反应 0.5h,
以68%的产率得到(4S,5R,6S)-3-{[Allyloxycarbonyl-(1H-imidazol-2-yl)-amino]-methyl}-6-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester