申请人:Ciba-Geigy Corporation
公开号:US04612378A1
公开(公告)日:1986-09-16
The reaction of 2-mercapto-benzothiazole or -benzimidazole with .alpha.,.beta.-unsaturated carboxylic acids in a strongly acid reaction medium gives compounds of the formula I ##STR1## in which X is sulfur or NH, each radical R independently of one another is H, alkyl, halogenoalkyl, alkoxy, alkylthio, alkylsulfonyl, phenyl, alkylphenyl, phenylalkyl, cycloalkyl, halogen, NO.sub.2, CN, COOH, COOalkyl, OH or an amino or carbamyl group and R.sup.1, R.sup.2 and R.sup.3 independently of one another are H, alkyl, halogenoalkyl, hydroxyalkyl, alkoxyalkyl, carboxyalkyl, carboxyl or unsubstituted or substituted aryl or aralkyl, or R.sup.1 and R.sup.2 together are straight-chain or branched alkylene, which can be substituted by 1 or 2 carboxyl groups.
2-巯基苯并噻唑或苯并咪唑与α,β-不饱和羧酸在强酸性反应介质中反应,得到式I的化合物
其中X是硫或NH,每个基团R独立地是H、烷基、卤代烷基、烷氧基、烷硫基、烷基磺基、苯基、烷基苯基、苯基烷基、环烷基、卤素、NO2、CN、COOH、COO烷基、OH或氨基或氨基甲酰基,R1、R2和R3分别独立地是H、烷基、卤代烷基、羟基烷基、烷氧基烷基、羧基烷基、羧基或未取代或取代的芳基或芳基烷基,或R1和R2一起是直链或支链烷基,可被1或2个羧基取代。