A series of 2α-alkoxymethyl cephem sulfones were prepared by nucleophilic addition of a variety of alcohols to exo-2-methylene cephem sulfones. The 2α-alkoxymethyl group was introduced with the aim of improving the inhibitory activity against human leukocyte elastase (HLE) over the unsubstituted compounds. However, against HLE the in vitro activity was still inferior to that shown by the C-2 unsubstituted cephem sulfones.
一系列2α-烷氧甲基头孢烯磺酸盐通过亲核加成反应制备,反应使用多种醇与exo-2-亚甲基头孢烯磺酸盐反应。引入2α-烷氧甲基基团的目的是提高对人类白细胞弹性蛋白酶(HLE)的抑制活性,但在体外实验中,对HLE的活性仍然低于C-2未取代的头孢烯磺酸盐。