申请人:Bayer Aktiengesellschaft
公开号:US04293715A1
公开(公告)日:1981-10-06
In the preparation of an .omega.-azolyl-acetophenone oxime ether of the formula ##STR1## in which R is halogen, alkyl, alkoxy, alkylthio, alkylsulphonyl, halogenoalkyl, nitro, cyano, optionally substituted phenyl or optionally substituted phenoxy, R' is alkyl, alkenyl, alkynyl, optionally substituted cycloalkylalkyl, optionally substituted aralkyl or optionally substituted aralkenyl, n is 1, 2 or 3, Hal is halogen, and Z is CH or N, wherein the .omega.-halogen of an .omega.-halogeno-acetophenone of the formula ##STR2## is replaced by an azole of the formula ##STR3## and the keto oxygen is replaced by .dbd.N--O--R.sup.1, the improvement which comprises first reacting the .omega.-halogeno-acetophenone with a hydroxylamine ether of the formula H.sub.2 N--O--R' to produce an .omega.-halogeno-acetophenone oxime ether of the formula ##STR4## and reacting the acetophenone oxime ether with the azole, thereby to obtain the desired product in enhanced yield. The intermediate acetophenone oxime ethers are new.
在制备一种具有以下结构的.omega.-唑基-苯乙酮肟醚化合物时,其中R为卤素、烷基、烷氧基、烷硫基、烷磺酰基、卤代烷基、硝基、氰基、可选择取代的苯基或可选择取代的苯氧基,R'为烷基、烯基、炔基、可选择取代的环烷基烷基、可选择取代的芳基烷基或可选择取代的芳基烯基,n为1、2或3,Hal为卤素,Z为CH或N,其中在以下结构的.omega.-卤代苯乙酮中,.omega.-卤素被以下结构的唑烷所取代,酮氧被.dbd.N--O--R.sup.1所取代,改进包括首先将.omega.-卤代苯乙酮与以下结构的羟胺醚反应,生成以下结构的.omega.-卤代苯乙酮肟醚,然后将苯乙酮肟醚与唑烷反应,从而提高产率获得所需产品。中间体苯乙酮肟醚是新的。