Abstract The synthesis of several ricinoleic acid thiol esters starting from cis-(R)-12- hydroxyoctadec-9-enoic acid and thiols in the presence of N, N′-dicyclohexylcarbodiimide (DCC) is described. The method is efficient for aromatic and aliphatic thiols, selectively affording the respective fat acid thiol esters in good yields under mild, neutral, and solvent- free conditions. The protocol is general and was extended to other carboxylic acids, ...