反应详情

1 g of 3-(4-chlorophenyl)-4,5,6,7-tetrahydro-1,2-benzisoxazole-5,5-dicarboxylic acid was heated to 200°-210° C. for 5 minutes until effervescence had ceased. The residue was dissolved in ethanol and there was obtained from the solution 0.67 g of 3-(4-chlorophenyl)-4,5,6,7-tetrahydro-1,2-benzisoxazole-5-carboxylic acid of melting point 203°-205° C.