(2S,5S,6S)-6-Allyloxy-5-methylselanyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester 在
偶氮二异丁腈 、
三正丁基氢锡 作用下,
以
乙腈 为溶剂,
反应 1.0h,
以62%的产率得到(3R,4aR,7aS)-7-Methyl-4-oxo-hexahydro-5-oxa-1-thia-3a-aza-cyclobuta[1,2:1,4]dicyclopentene-3-carboxylic acid benzyl ester