| 摘要 |
The invention relates to a method for efficiently producing ß-mercaptocarboxylic acids using a solid acid catalyst such as zeolite, which product corresponds to respective starting materials selected from a, ß-unsaturated carboxylic acids (a, ß-unsaturated carboxylic acid, a, ß-unsaturated carboxylic acid ester, ex, ß-unsaturated amide, a, ß-unsaturated aldehide and a, ß-unsaturated ketone) and hydrogen sulfides (hydrogen sulfide, sulfide salt and hydrosulfide salt), wherein a solvent compatible with water is used in the reaction. According to the invention, ß-mercaptocarboxylic acids which are useful as additives in synthetic materials for pharmaceutical or agricultural agents and in polymer compounds can be industrially produced efficiently by using easily available a, ß-unsaturated carboxylic acid (such as crotonic acid) at high yield. |
