Synthesis of alkyl 6-methyl-4-(2-trifluoromethylphenyl)-1,2,3,4-tetrahydro-2<i>H</i>-pyrimidine-2-one-5-carboxylates possessing a N-3 nitro substituent to determine calcium channel modulation structure-activity relationships
作者:Kuljeet Kaur、Edward E. Knaus
DOI:10.1002/jhet.5570440324
日期:2007.5
urea (2) and an alkyl acetoacetate (3) afforded the respective alkyl (Me, Et, i-Pr, i-Bu) 6-methyl-4-(2-trifluoromethylphenyl)-1,2,3,4-tetrahydro-2H-pyrimidine-2-one-5-carboxylate (4-7). Subsequent N3-nitration of the alkyl esters (4-7) using Cu(NO3)2 3H2O and Ac2O furnished the target alkyl 6-methyl-3-nitro-4-(2-trifluoromethylphenyl)-1,2,3,4-tetrahydro-2H-pyrimidine-2-one-5-carboxylates (8-11). The N3-nitro