作者:Yougui Zhao、Ronggeng Wang、Mei Liu
DOI:10.1007/s11164-013-1109-0
日期:2014.5
The objective was to synthesize (Z)-2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-ethoxyiminoacetic acid (the side chain for Ceftaroline fosamil). Oximation and alkylation were used on cyanoacetamide to get 2-cyano-2-hydroxyiminoacetamide, which became 2-ethyoxyiminopropanedinitrile through reaction with phosphorus oxychloride, and then aminolysis to get 2-ethoxyiminopropanedinitrile, which became 2-ethoxyimion-2-(5-amino-1,2,4 thiadiazol-3-yl) acetonitrile by brominating and with KSCN, followed by hydrolysis to get (Z)-2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-ethoxyiminoacetic acid.
目的是合成(Z)-2-(5-氨基-1,2,4-噻二唑-3-基)-2-乙氧基亚氨基乙酸(头孢他啶 fosamil 的侧链)。对氰基乙酰胺进行氧化和烷基化反应,得到 2-氰基-2-羟基亚氨基乙酰胺,再与氧氯化磷反应,得到 2-乙氧基亚氨基丙二腈,然后进行氨解反应,得到 2-乙氧基亚氨基丙二腈、通过溴化并与 KSCN 反应生成 2-乙氧基亚氨基-2-(5-氨基-1,2,4-噻二唑-3-基)乙腈,然后水解得到 (Z)-2-(5-氨基-1,2,4-噻二唑-3-基)-2-乙氧基亚氨基乙酸。