- and -1-methyl-3-hydroxymethyl- and 1,3-dimethylperhydroquinazolinones (,, ,) and-hydroxymethyl-1,3-perhydrobenzoxazinones (,) were synthesized by using a formaldehyde-formic acid mixture for reductive methylation, condensation and hydroxymethylation.
作者:Ferenc Fülöp、Gábor Bernáth、Kalevi Pihlaja、Jorma Mattinen、Gyula Argay、Alajos Kálmán
DOI:10.1016/s0040-4020(01)86914-3
日期:1987.1
l-in-4-one and their 3-methyl-substituted derivatives in stereospecific or stereoselectlve syntheses. The relative configurations of the quinazolones were assigned via DNOE measurements. Crystal structure determinations of - and - were also performed by X-ray diffraction.
Ring−Chain Tautomerism of 2-Aryl-Substituted <i>cis</i>- and <i>trans</i>-Decahydroquinazolines
作者:László Lázár、Anikó Göblyös、Tamás A. Martinek、Ferenc Fülöp
DOI:10.1021/jo020070j
日期:2002.7.1
and trans-3-phenyldecahydroquinazolines proved to be three-component (r(1)[bond]o[bond]r(2)) ring[bond]chain tautomeric mixtures, whereas only ring-closed tautomers could be detected for the 3-methyl-substituted analogues. The proportions of the ring-chaintautomeric forms at equilibrium were strongly influenced by the N-substitutents and the cis-trans ring junction and could be described by the equation