申请人:American Cyanamid Company
公开号:US04074046A1
公开(公告)日:1978-02-14
Process for preparing known classes of 2-substituted azoles (I) and N-acylazolinones (II) by reacting carbon monoxide at elevated temperature and pressure in the presence of a cocatalyst composition, of which 5% palladium on carbon with a Lewis acid such as ferric chloride is representative, with a nitrogenous compound (III): ##STR1## to form the products (usually in admixture): ##STR2## where R is alkyl, alkenyl, aralkyl, aryl, styrl or ##STR3## R.sub.1 and R.sub.2 are hydrogen, alkyl, alkoxy, aryl, halo or, when taken together on adjacent carbon atoms, -CH.dbd.CH-CH.dbd.CH-; R.sub.4 may be alkyl, alkenyl, aralkyl, aryl, styryl, ##STR4## X is oxygen, sulfur or imino, Y is alkylene, alkenylene or arylene; and Z is nitro, azo or azoxy.
在高温高压条件下,通过在存在辅催化剂组合物的情况下将一氧化碳与一种氮化合物(III)反应,制备已知类别的2-取代咪唑(I)和N-酰基咪唑酮(II)的过程,其中5%的钯在碳上与一种路易斯酸,如氯化铁相结合,是代表性的。反应产物通常是混合物:##STR2## 其中,R是烷基,烯基,芳基甲基,芳基,苯乙基或##STR3## R.sub.1和R.sub.2是氢,烷基,烷氧基,芳基,卤素或者当相邻的碳原子上取代基结合时,是-CH.dbd.CH-CH.dbd.CH-; R.sub.4可能是烷基,烯基,芳基甲基,芳基,苯乙基,##STR4## X是氧,硫或亚胺,Y是烷基,烯基或芳基烷基,Z是硝基,偶氮或偶氧基。