Convergent assembly of structurally diverse quinazolines
作者:Abel Crespo、Alberto Coelho、Paula M. Diz、Franco Fernández、Hector Novoa de Armas、Eddy Sotelo
DOI:10.1039/c0ob00608d
日期:——
A convergent and versatile Vilsmeier–Haack-based carbo-annulation strategy that exhibits an unusually elevated bond-forming efficiency has been developed. By virtue of its innovative approach, structure economy and simple execution conditions the methodology reported here constitutes a very attractive protocol that enables the rapid assembly of structurally diverse quinazoline chemotypes.
Novel Dihydropyrimidine Derivatives And Their Use As Anti-Cancer Agents
申请人:Lopez Roman
公开号:US20080145453A1
公开(公告)日:2008-06-19
The invention concerns molecules of formula (I), drugs containing same and their use as anti-cancer agents.
本发明涉及公式(I)的分子,含有该分子的药物以及它们作为抗癌剂的使用。
Studies on Fused β-Lactams: Synthesis of 1-Aza Analogs of Cephem
作者:S. D. Sharma、Verinder Kaur、Punita Bhutani、J. P. S. Khurana
DOI:10.1246/bcsj.65.2246
日期:1992.8
Annelation of 2-methylthio-3,4-dihydropyrimidine (3) with two moles of phenoxyacetyl chloride in presence of triethylamine did not yield the expected β-lactam (6) and instead the N-acylated compound 5a was obtained. Various N-acylated pyrimidines 5a–d also failed to yield any β-lactam. However, β-lactam ring has been conveniently grafted on to 2-methylthio-3,6-dihydropyrimidines 9a–d, 12 by annelating them with in situ prepared aryloxyketenes to furnish novel 1-aza analogs of cephem 10a–e and 13.
Compounds belonging to the 5-acyl-3,4-dihydropyrimidine-2-thione family were obtained using a solvent-free Biginelli condensation with or without the use of a catalyst. An unprecedented solid-phase procedure involving a polymer-supported aldehyde allowed the preparation of a series of 5-aroyl derivatives starting with crude diketones obtained from their corresponding aryl esters.