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 phenyl isocyanate or phenyl isothiocyanate and followed by dissociation of the resulting cycloadducts (1,3-diazetidinones (3) and 1,3-diazetidithiones (4)).
环化 1,3,5-三嗪-2,4(1H,3H)-二酮和 -2,4(1H,3H)-二硫酮(8 和 9)通过杂环杂枯烯(6 和7)。这些杂枯烯是由部分环状 1,3-二氮杂-1,3-丁二烯 (1a-c) 通过与异氰酸苯酯或异硫氰酸苯酯的 2π+2π 环加成反应生成的,然后解离所得环加合物 (1,3 -二氮杂环庚酮 (3) 和 1,3-二氮杂二硫酮 (4))。