The kinetically controlled products of the reaction of triaryl phosphites and bromine or chlorine are stabilized by the presence of tertiary amine bases or halide complexing reagents. The stabilized halogenating reagents are useful in the preparation of 3-halo-3-cephem antibiotic compounds.
三芳基
磷酸酯与
溴或
氯反应所得的动力学控制产物,在存在三级胺碱或卤化物络合试剂的情况下被稳定。这些稳定的卤化试剂在制备3-卤代-3-
头孢菌素类抗生素化合物中很有用。