The phenylacetyl ethanolamine,a low toxic precurson of benzylpenicillin,was synthesized by using ethyl phenylacetate and colamine as raw materials.

以苯乙酸乙酯和乙醇胺为原料合成了苄青毒前体苯乙酰基乙醇胺。

The title resin has been prepared by Friedel-Crafts acylation followed by bromination and amination.The method avoids the utilization of cancerogenic chloromethyl methyl ether.

通过付氏酰基反应引入乙酰基，接着溴、胺，得到标。该法避免了使用氯甲醚。

Using 2-acetyl benzimidazole and sodium bromide as raw material,2-(dibromine acetyl)-benzimidazole hydrobromate was synthesized with the new bromine that displaced by chlorine gas in light.

以2-乙酰基苯并咪唑和溴钠为原料,在光照条件下用氯气置换出溴钠中的溴,合成兽药噻苯咪唑中间体-2-(二溴乙酰基)-苯并咪唑氢溴酸盐。