An efficient method for the preparation of the unsymmetrically substituted 1,3-dithiole-2-thione-4,5-dithiolate (dmit) is reported. Its application is demonstrated by obtainment of various 1,3-dithiole-2-thione-4-thiolate-5-thioesters and ethers. Starting from these compounds an expedient route to novel unsymmetrical crown compounds and tetrathiafulvalenes is shown.