synthesized in satisfactory yields from 2-bromophenyl isothiocyanates in one pot via generation of the corresponding 2-lithiophenyl isothiocyanates by bromine-lithium exchange with butyllithium followed by treatment with arylisothiocyanates. quinazoline-2,4(1H,3H)-dithiones - 2-lithiophenyl isothiocyanates - 2-bromophenyl isothiocyanates - arylisothiocyanates - benzothioamides