| 摘要 |
Chloroquinoxalinecarboxylic acid chlorides and dicarboxylic acid anhydrides of the formula <FORM:0995483/C2/1> are prepared by reacting a hydroxyquinolinecarboxylic acid of the formula <FORM:0995483/C2/2> in which n and n1 are 1 or 2 in an inert organic solvent with phosgene in the presence of a carboxamide catalyst at 80 DEG to 150 DEG C. When n is 1 an acid chloride is obtained and when n is 2 a dicarboxylic acid anhydride is obtained. The carboxamide catalyst may be an N,N-dialkyl amide or N-alkyl-N-acyl amide, or a lactam. The compounds are useful in the manufacture of dyes. Specification 315,451 is referred to. |
