Chen Ai-lian
2008
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Journal
Hebei Journal of Industrial Science and Technology
Abstract
2-(5-amino-1,2,4-thiadiazol-3-yl)-2-alkoxylimino acetic acid is applied in the preparation of novel cephalosprins.A reasonable synthetic route was designed,in which cyanoacetamide was used as starting material,then through oximation,alkylation,aminolysis,bromation,cyclization with postassium thiocyanate,hydrolysis in base environment,to obtain 2-(5-amino-1,2,4-thiadiazol-3-yl)-2-alkoxyimino acetic acid.