4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-(2-propenyl)-, diphenylmethyl ester, 4,4-dioxide 、
异氰酸苯酯 、
硝基丙烷 在
三乙胺 作用下,
以
苯 为溶剂,
以88 mg (12%)的产率得到diphenylmethyl [2S-(2α, 5α, 6β)]-6-[(3-ethyl-4,5-dihydro-5-isoxazolyl)methyl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide