申请人:BASF Aktiengesellschaft
公开号:US04894483A1
公开(公告)日:1990-01-16
Vinylglyoxal derivatives of the general formula I ##STR1## where R is straight-chain or branched alkyl or alkenyl, cycloalkyl or unsubstituted or substituted phenyl, are prepared by a process in which bicyclo[2.2.1]hept-5-enecarbaldehyde of the formula V ##STR2## is either (a) subjected to autocondensation with formation of a compound of the formula VII ##STR3## or (b) reacted with a compound of the general formula II R-CH.dbd.O (II) where R has the above meanings, with formation of a mixture of the compounds of the general formulae VIII (a) and (b) ##STR4## where R is as defined above, in the presence of a catalyst, and the compound of the formula VII or the compounds of the formulae VIII (a) and (b) is or are oxidized to the corresponding dicarbonyl compounds, after which gas-phase pyrolysis is carried out at from 500.degree. to 700.degree. C. and under reduced pressure, in particular less than 10.sup.-1 mbar, and, if desired, the resulting compound of the general formula I is further purified. These compounds can be used, for example, as monomer components in polymeric systems.
通式I的乙烯基丙酮衍生物 ##STR1## 其中R是直链或支链烷基或烯基,环烷基或未取代或取代的苯基,通过以下过程制备:将通式V的双环[2.2.1]庚-5-烯甲醛 ##STR2## (a)自缩合生成通式VII的化合物 ##STR3## 或(b)与通式II的化合物 R-CH.dbd.O (II) 反应,其中R具有上述含义,生成通式VIII (a)和(b)的混合物 ##STR4## 其中R如上所述,在催化剂的存在下,将通式VII或通式VIII (a)和(b)的化合物氧化成相应的二羰基化合物,然后在500°C至700°C的气相裂解下进行,压力降低,特别是小于10.sup.-1 mbar,如果需要,进一步纯化得到通式I的相应化合物。这些化合物可以用作聚合物系统中的单体组分。