(2R,4S)-2-((R)-Hydroxycarbamoyl-phenylacetylamino-methyl)-5,5-dimethyl-thiazolidine-4-carboxylic acid tert-butoxycarbonylmethyl ester 在
1-(二乙氨基)丙炔 作用下,
以
二氯甲烷 为溶剂,
以64%的产率得到2-thia-3,3-dimethyl-4R-(t-butyloxycarbonylmethylene)carboxylate-5,7-diaza-6-oxo-8R-phenylacetamido-bicyclo-1R-<3,3,0>octane