乙酸酐 、
(3R,4S)-4-hydroxymethyl-3-phenoxyacetamido-2-oxo-1-sulfoazetidine 3,3,6,9,9-pentamethyl-2,10-diazabicyclo<4.4.0>-1-decene salt 以
吡啶 为溶剂,
以92%的产率得到(3R,4S)-4-acetoxymethyl-3-phenoxyacetamido-2-oxo-1-sulfoazetidine 3,3,6,9,9-pentamethyl-2,10-diazabicyclo<4.4.0>-1-decene salt