作者:C. Moussebois、R. Lenaers、F. Eloy
DOI:10.1002/hlca.19620450204
日期:——
1,2,4-Oxadiazole (V) has been prepared by formylation of formamidoxime with acetico-formic anhydride and cyclization of the O-formyl derivative VI. Some N-formyl-formamidoxime (VII) is formed during this reaction. Isolated by the salting out of its aqueous solution the crude oxadiazole is purified by means of its addition product with CdCl2, which yields pure oxadiazole by steam distillation and subsequent
1,2,4-恶二唑(V)是通过将甲酰胺肟与乙甲酸酐甲酰化并将O-甲酰基衍生物VI环化而制得的。在该反应过程中形成一些N-甲酰基-甲酰胺肟(VII)。通过从其水溶液中盐析分离出粗二唑,通过其与CdCl 2的加成产物进行纯化,其通过蒸汽蒸馏和随后的盐析得到纯的恶二唑。