Studies on quinazoline chemistry. 5.* Synthesis of 3,4-dihydroquinazolines with functional substituents at C-2 atom and their alkylation reactions
作者:E. V. Gromachevskaya、E. A. Kaigorodova、K. S. Pushkareva、G. D. Krapivin
DOI:10.1007/s10593-013-1163-y
日期:2013.1
4-dihydroquinazolines by the reaction of o-aminophenyldiphenylcarbinol (APC) with various nitriles. The reaction of APC with substituted 5-bromo-3-cyano-2(1H)-pyridones leads to the formation of derivatives of two products: 3,4-dihydroquinazolines and 4H-3,1-benzoxazines. The alkylation of 3,4-dihydroquinazolines using dimethyl sulfate proceeds through N,N-dimethylation. The structure of these products is a function
Studies on quinazoline chemistry 6*. Synthesis and alkylation of 2-substituted 4,4-diphenyl-3,4-dihydroquinazolines
作者:Elena V. Gromachevskaya、Elena A. Kaigorodova、Leonid D. Konyushkin
DOI:10.1007/s10593-017-2091-z
日期:2017.5
New 2-aryl-4,4-diphenyl-3,4-dihydroquinazolines were obtained by a reaction of (2-aminophenyl)(diphenyl)carbinol with nitriles. Methylation of 3,4-dihydroquinazolines with excess of dimethyl sulfate occurred at two nitrogen atoms, while the subsequent alkaline hydrolysis was accompanied by opening of the heterocycle at the C(2)–N(3) bond, forming the respective amides. The molecular structure of N