SYNTHESIS OF SOME NEW 2,4,6-TRISUBSTITUTEDTHIAZOLO-[5,4-d] PYRIMIDINE-5,7(4H,6H)-DIONES. | ||||
Zagazig Journal of Pharmaceutical Sciences | ||||
Article 10, Volume 8, Issue 1, June 1999, Page 76-81 PDF (2.13 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/zjps.1999.184169 | ||||
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Authors | ||||
Wahid Basyouni ![]() | ||||
Pesticide Chemistry Department, National Research Centre, Dokki, Cairo, Egypt. | ||||
Abstract | ||||
Reaction of 2,6-disubstitutedthiazolo5,4-dpyrimidin-7(6H)-ones 2 with ethyl chloroformate/ethanol mixture afforded 5-(ethoxycarbonylamino) -2-(substitutedthio) thiazole-4-(N-substituted)-carboxamides 4a-c. Thermal fusion of 4 followed by treatment with dimethyl sulfate gave the corresponding trisubstituted thiazolo[5,4-d]-pyrimidinediones 6. When the thiazole esters 7a,b were reacted with ethyl chloroformate, the corresponding ethyl 5-(ethoxycarbonyl)-aminothiazole-4-carboxylates 8 were Oblained. Reaction of 8b with benzylamine gave the 2-benzylthio-5-(3-benzylureido)thiazole-4-(N-benzyl)carboxamide 9. | ||||
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