作者:Rei Matsueda
DOI:10.1246/cl.1978.979
日期:1978.9.5
A mild and efficient method for the preparation of esters of cephalosporanic acids via the 3-nitro-2-pyridinethiol ester, easily prepared by the reaction of cephalosporanic acid salt with 3-nitro-2-pyridinesulfenyl halide and triphenylphosphine, is reported. Pure Δ3-esters of various cephalosporanic acids were prepared in good yields by this method without accompanying isomerization of the thiazine
报道了一种通过 3-硝基-2-吡啶硫醇酯制备头孢烷酸酯的温和有效的方法,该方法很容易通过头孢烷酸盐与 3-硝基-2-吡啶硫基卤化物和三苯基膦反应制备。通过该方法以良好的产率制备了各种头孢烷酸的纯 Δ3-酯,而没有伴随噻嗪环的异构化。