An Unequivocal Synthesis of 4-Amino-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-2,7-diones and 2-Amino-3,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-4,7-diones
Selective Hydrolysis of 2,4-Diaminopyrimidine Systems: A Theoretical and Experimental Insight into an Old Rule
作者:J. Teixidó、J. I. Borrell、C. Colominas、X. Deupí、J. L. Matallana、J. L. Falcó、B. Martinez-Teipel
DOI:10.1021/jo0056390
日期:2001.1.1
unexpectedly afforded exclusively the 4-amino-2-oxopyrimidine isomer (3). In this paper, we present the experimental work and ab initio calculations carried out to understand this discrepancy. As a part of such study, eight compounds containing a 2,4-diaminopyrimidine moiety were calculated in gas phase and in aqueous solution, and some acid hydrolyses were reexamined. Results showed that the presence of an
A three-component synthesis of pyrido[2,3-d]pyrimidines
作者:Núria Mont、Jordi Teixidó、José I Borrell、C.Oliver Kappe
DOI:10.1016/s0040-4039(03)01306-6
日期:2003.7
A new, high yield multicomponent reaction providing multifunctionalized pyrido[2,3-d]pyrimidines in a microwave-assisted one-pot cyclocondensation of alpha,beta-unsaturated esters, amidine systems and malononitrile (or ethyl cyanoacetate) is described (the 'Victory' reaction). (C) 2003 Elsevier Science Ltd. All rights reserved.
VICTORY, PEDRO;CRESPO, ANA;NOMEN, ROSA;BORRELL, JOSE I., AFINIDAD, 46,(1989) N20, C. 107-113
作者:VICTORY, PEDRO、CRESPO, ANA、NOMEN, ROSA、BORRELL, JOSE I.
DOI:——
日期:——
VICTORY, P.;NOMEN, R.;COLOMINA, O.;GARRIGA, M.;CRESPO, A., HETEROCYCLES, 1985, 23, N 5, 1135-1141
作者:VICTORY, P.、NOMEN, R.、COLOMINA, O.、GARRIGA, M.、CRESPO, A.