Benzimidazol-2-yl di- or tri-thiocarbonates and iso- or isothio-cyanates give, on heating in the presence of triethylamine, the novel [1,3,5]thiadiazino[3,2-a]benzimidazole-2,4(3H)-diones (11; X = Y = O) or their sulphur analogues (11; X = S, Y = O; or X = Y = S).
在
三乙胺存在下加热,
苯并咪唑-2-基二
硫代或
三硫代碳酸酯和异
硫氰酸酯或异
硫氰酸酯生成新型[1,3,5]噻二嗪[3,2 - a ]
苯并咪唑-2,4 (3 H)-二酮(11; X = Y = O)或它们的
硫类似物(11; X = S,Y = O;或X = Y = S)。