cyclohexyloxycarbonyloxymethyl {(2R,3S)-3-[(1R)-1-(tert-butyldimethyl-silyloxy)ethyl]-2-[2-(1-ethyl-5-methyl-1H-pyrazol-3-yl)-2-oxoethyl]-4-oxo-1-azetidinyl}(methyl(diphenyl)-λ5-phosphanylidene)acetate 以
xylene 为溶剂,
反应 1.5h,
生成
Cyclohexyloxycarbonyloxymethyl (5R,6S)-3-(1-ethyl-5-methyl-1H-pyrazol-3-yl)-7-oxo-6-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate