A new efficient procedure for synthesis of macrocyclicamides has been exploited by aminolysis of thiazolidine-2-thione amide (1) of dicarboxylic acid with diamines (4), or spermidine (7). A variety of macrocyclic diamides (5 and 8) and/or tetramides (6, 9, 12, and 13) have been synthesized in high yields. One can monitor the reaction, since the original yellow color of the starting material (1) disappears