Synthesis of trichloromethylpyrimidines and trichloromethylpyrimido [4,5-d]pyrimidines from alkyl 2-(diaminomethylidene)-3-oxobutyrates and trichloroacetonitrile
Synthesis of trichloromethylpyrimidines and trichloromethylpyrimido [4,5-d]pyrimidines from alkyl 2-(diaminomethylidene)-3-oxobutyrates and trichloroacetonitrile
Synthesis of trichloromethylpyrimidines and trichloromethylpyrimido [4,5-d]pyrimidines from alkyl 2-(diaminomethylidene)-3-oxobutyrates and trichloroacetonitrile
作者:V. A. Voronkova、A. V. Komkov、V. A. Dorokhov
DOI:10.1007/s11172-010-0015-5
日期:2009.2
Heterocyclization of alkyl 2-(diaminomethylidene)-3-oxobutyrates with trichloroacetonitrile yields alkyl 4-mino-6-methyl-2-trichloromethylpyrimidine-5-carboxylates. The latter compounds react with aryl isocyanates to produce the corresponding pyrimidinylureas, which undergo cyclization to 3-aryl-5-methyl-7-trichloromethylpyrimido[4,5- d]pyrimidine-2,4(1H,3H)-diones under the action of MeONa in MeOH.