Addition Reaction of Phenyl Isocyanate and Phenyl Isothiocyanate to Partially Cyclic 1,3-Diaza-1,3-butadienes. Synthesis of Annulated 1,3,5-Triazine-2,4(1<i>H</i>,3<i>H</i>)-diones and -2,4(1<i>H</i>,3<i>H</i>)-dithiones
作者:Mahmoud A. Abdel-Rahman
DOI:10.1246/bcsj.66.510
日期:1993.2
3H)-dithiones (8 and 9) are synthesized by a 4π+2π cyclodimerization of heterocyclic heterocumulenes (6 and 7). These heterocumulenes are generated from partially cyclic 1,3-diaza-1,3-butadienes (1a—c) by means of a 2π+2π cycloaddition reaction with phenylisocyanate or phenyl isothiocyanate and followed by dissociation of the resulting cycloadducts (1,3-diazetidinones (3) and 1,3-diazetidithiones (4)).