Synthesis of Naphthoquinone Derivatives. XIII. Reaction of 2,3-Dihydro-2-thioxo-1<i>H</i>-naphth[2,3-<i>d</i>]imidazole-4,9-dione with Dimethyl Acetylenedicarboxylate
作者:Tateo Nakamori、Toshiyuki Saito、Toshiyasu Kasai
DOI:10.1246/bcsj.61.2019
日期:1988.6
fused to 1H-naphth[2,3-d]imidazole-4,9-dione were synthesized. Dimethyl 2-(4,9-dioxo-4,9-dihydronaphth[2,3-d]imidazol-2-ylthio)fumarate (3) was obtained by a reaction of 2,3-dihydro-2-thioxo-1H-naphth[2,3-d]imidazole-4,9-dione with dimethyl acetylenedicarboxylate in methanol. A ring-closure reaction of 3 in acetic anhydride was found to give selectively methyl (3,5,10-trioxo-2,3,5,10-tetrahydronaphth[2′
合成了具有与 1H-naphth[2,3-d]imidazole-4,9-dione 稠合的噻唑烷酮或噻嗪酮环的四环化合物。2-(4,9-dioxo-4,9-dihydronaphth[2,3-d]imidazol-2-ylthio)fumarate (3) 由 2,3-dihydro-2-thioxo-1H- 反应得到萘[2,3-d]咪唑-4,9-二酮与乙炔二羧酸二甲酯在甲醇中的反应。发现 3 在乙酸酐中的闭环反应选择性地产生甲基(3,5,10-三氧代-2,3,5,10-四氢萘[2',3' : 4,5]咪唑并[2,1 -b]thiazol-2-ylidene)acetate,而 3 在多磷酸中环化得到 4,6,11-trioxo-6,11-dihydro-4H-naphth[2',3' : 4,5]咪唑并[2,1-b]噻嗪-2-羧酸盐。