Solvent-free Synthesis of Novel and Known Octahydroquinazolinones/thiones by the Use of ZrOCl<sub>2</sub>.8H<sub>2</sub>O as a Highly Efficient and Reusable Catalyst
作者:Sajad Karami、Bahador Karami、Saeed Khodabakhshi
DOI:10.1002/jccs.201200145
日期:2013.1
A solvent‐free reaction between urea/thiourea, dimedone and aromatic aldehydes in the presence of catalytic amounts of zirconium (IV) oxychloride octahydrate (ZrOCl2.8H2O) as a powerfull Lewis acid leads to octahydroquinazolinone/thione derivatives in good yields. This method has advantages such as avoidance of the organic solvents, production of pure products without any by‐product, short reaction
Indium(III) Trifluoromethanesulfonate: a Reusable Catalyst for the Sol-vent-free Synthesis of some Quinazolinones/thiones
作者:Bahador Karami、Saeed Khodabakhshi、Sajad Karami
DOI:10.5562/cca2087
日期:——
An environmentally friendly and clean procedure gives octahydroquinazolinones/thiones by a simple Biginelli condensation of urea/thiourea, aromatic aldehydes, and cyclic 1,3-diones in the presence of indium(III) trifluoromethanesulfonate (In(OTf)(3)) in solventless conditions. This method has advantages such as avoidance of the organic solvents, high yield of pure products without any by-product, short reaction times and operational simplicity.