申请人:BASF Aktiengesellschaft
公开号:US04723042A1
公开(公告)日:1988-02-02
Alpha,beta-substituted acroleins of the general formula I ##STR1## where A and B are identical or different and are each C.sub.1 -C.sub.4 -alkyl, naphthyl, biphenyl or phenyl which may be monosubstituted or polysubstituted by halogen, nitro, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, phenoxy or phenylsulfonyl, are prepared by a process in which a compound of the general formula III ##STR2## where A has the above meanings and R.sup.1 and R.sup.2 are identical or different and are each C.sub.1 -C.sub.4 -alkyl or together possess the carbon atoms required to complete a ring, is reacted with a phosphorus compound of the general formula IV or V ##STR3## where B the meanings stated above, R.sup.1 and R.sup.2 are as defined above and X.sup..crclbar. is a halide ion, in the presence of a base. The alpha,beta-substituted acroleins can be further processed to give hydroxymethyloxiranes.
通式为I的α,β-取代丙烯醛,其中A和B相同或不同,均为C.sub.1-C.sub.4烷基,萘基,联苯基或苯基,可以是单取代或多取代的卤素,硝基,C.sub.1-C.sub.4烷基,C.sub.1-C.sub.4烷氧基,C.sub.1-C.sub.4卤代烷基,苯氧基或苯基磺酰基,通过以下方法制备:将通式III的化合物##STR2##其中A具有上述含义,R.sup.1和R.sup.2相同或不同,均为C.sub.1-C.sub.4烷基或一起具有完成环所需的碳原子,与通式IV或V的磷化合物反应##STR3##其中B为上述含义,R.sup.1和R.sup.2如上所定义,X.sup..crclbar.为卤离子,在碱存在下。α,β-取代丙烯醛可以进一步处理,得到羟甲基环氧烷。