申请人:Ciba-Geigy Corporation
公开号:US04652653A1
公开(公告)日:1987-03-24
The reaction of 2-mercapto-benzothiazole or -benzimidazole with .alpha.,.beta.-unsaturated carboxylic acid derivatives 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, halogenalkyl, alkoxy, alkylthio, alkylsulfonyl, phenyl, alkylphenyl, phenylalkyl, cycloalkyl, halogen, NO.sub.2, CN, COOH, COOalkyl or a tertiary amino or carbamoyl group and R.sup.1, R.sup.2 and R.sup.3 independently of one another are H, alkyl, halogenalkyl, hydroxyalkyl, alkoxyalkyl unesterified or esterified carboxyl or carboxylalkyl, carbamyol, carbamyolalkyl 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, R.sup.4 is unsubstituted or substituted amino, alkoxy, cycloalkoxy, aryloxy or aralkyloxy, or R.sup.2 and R.sup.4 together are CH.sub.2 --CO--O-- or --CH.sub.2 CO--NR.sup.5 -- or R.sup.3 and R.sup.4 together are --CO--O-- or --CO--NR.sup.5 --, forming an anhydride or imide ring, wherein R.sup.5 is unsubstituted or substituted alkyl, cycloalkyl, aryl, aralkyl or hydrogen.
2-巯基苯并噻唑或苯并咪唑与α,β-不饱和羧酸衍生物在强酸反应介质中反应,生成式I的化合物##STR1## 其中X为硫或NH,每个基团R彼此独立地为H,烷基,卤代烷基,烷氧基,烷硫基,烷基磺酰基,苯基,烷基苯基,苯基烷基,环烷基,卤素,NO.sub.2,CN,COOH,COO烷基或三级胺或氨基甲酰基基团,而R.sup.1,R.sup.2和R.sup.3彼此独立地为H,烷基,卤代烷基,羟基烷基,未酯化或酯化的羧基或羧基烷基,氨基甲酰基,氨基甲酰基烷基或未取代或取代的芳基或芳基烷基,或R.sup.1和R.sup.2一起为直链或支链烷基,可以被1或2个羧基取代,R.sup.4为未取代或取代的氨基,烷氧基,环烷氧基,芳氧基或芳基烷氧基,或R.sup.2和R.sup.4一起为CH.sub.2--CO--O--或--CH.sub.2CO--NR.sup.5--或R.sup.3和R.sup.4一起为--CO--O--或--CO--NR.sup.5--,形成酐环或亚酰环,其中R.sup.5为未取代或取代的烷基,环烷基,芳基,芳基烷基或氢。