p-nitrobenzyl 2-<4-<<<<2-(tert-butyldimethylsilyloxy)ethyl>thio>thiocarbonyl>thio>-2-oxo-1-azetidinyl>-2-(triphenylphosphoranylidene)acetate 在
对苯二酚 作用下,
以
xylene 为溶剂,
反应 13.0h,
以69%的产率得到p-nitrobenzyl 3-<<2-(tert-butyldimethylsilyloxy)ethyl>thio>-7-oxo-4-thia-1-azabicyclo<3.2.0>hept-2-ene-2-carboxylate