反应详情

One-tenth mole of 4-(8-cyclohexyloctylamino)benzoyl chloride hydrochloride in methylene chloride is added to a solution of 0.1 mole of ethyl thiazolidine-4-carboxylate in chloroform containing two equivalents of triethylamine. After 5 hours at 20° C. the solution is filtered and evaporated to a white solid which is crystallized from acetonitrile. By means of the alkaline hydrolysis method of Example 1, the ethyl ester is converted to the subject carboxylic acid. This acid is also prepared using the procedure of this Example except that the acylation of the thiazolidine-4-carboxylic acid is carried out in aqueous acetone sodium bicarbonate solution.

1. filtrationAfter 5 hours at 20° C. the solution is filtered
2. customevaporated to a white solid which
3. customis crystallized from acetonitrile
4. customBy means of the alkaline hydrolysis method of Example 1
5. customThis acid is also prepared