5-(1-hydroxy-2-(naphthalen-1-yl)ethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione 、
(4R)-4,5-dihydrothiazole-4-carboxylic acid 4-nitrobenzyl ester 在
盐酸 作用下,
以
苯 为溶剂,
以63%的产率得到(2R,5S,6R)-6-(naphthalen-1-ylacetyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4-nitrobenzyl ester