New tricyclic compounds with pyrimido[4,5-d]pyrimidine fragment, the 7,8-dihydro-1H-pyrimido[4,5,6-de]quinazoline derivatives
作者:V. A. Dorokhov、V. A. Voronkova、A. V. Komkov、A. S. Shashkov
DOI:10.1007/s11172-011-0355-9
日期:2011.11
A reaction of 2-diaminomethylidenedimedone with aryl isocyanates leads to the formation of the corresponding ureas, which upon the action of sodium methoxide cyclize to 4-amino-7,8-dihydroquinazoline-2,5(1H,6H)-dione derivatives. The latter react with aryl isocyanates following the similar scheme to furnish 1,6-diaryl-8,8-dimethyl-7,8-dihydro-1H-pyrimido-[4,5,6-de]quinazoline-2,5(3H,6H)-diones, new tricyclic compounds containing pyrimidopyrimidine fragment.
2-diaminomethidenedimedone 与芳基异氰酸酯反应生成相应的脲,在甲醇钠的作用下环化成 4-氨基-7,8-二氢喹唑啉-2,5(1H,6H)-二酮衍生物。后者与芳基异氰酸酯发生类似的反应,生成 1,6-二芳基-8,8-二甲基-7,8-二氢-1H-嘧啶并[4,5,6-de]喹唑啉-2,5(3H,6H)-二酮,这是一种含有嘧啶片段的新型三环化合物。