A One-Pot Synthesis of 3,4-Dihydropyrimidin-2-(1H)-ones from Primary Alcohols Promoted by Bi(NO3)3·5H2O in Two Different Media: Organic Solvent and Ionic Liquid
作者:Ahmad Reza Khosropour、Ahmad R. Khosropour、Mohammd M. Khodaei、Mojtaba Beygzadeh、Mahbubeh Jokar
DOI:10.3987/com-04-10257
日期:——
A new, simple and efficientprocedure for the one-pot conversion of alcohols instead of aldehydes to the corresponding 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) with Bi(NO 3 ) 3 .5H 2 O as a commercially available, inexpensive, stable and non-toxic reagent in two media, acetonitrile (as an organic solvent) and tetrabutylammonium bromide (as an ionic liquid) is described. This one-pot oxidation-cyclocondensation
Abstract A simple, green, and efficientsynthesis protocol for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones using boehmite nanoparticles as catalyst was developed. It did not use any toxic metal catalysts or corrosive acidic reagents. The method gave good to excellent yields and has short reaction time, operational simplicity, and a recyclable catalyst.
Parallel synthesis of dihydropyrimidinones using Yb(III)-resin and polymer-supported scavengers under solvent-free conditions. A green chemistry approach to the Biginelli reaction
作者:Alessandro Dondoni、Alessandro Massi
DOI:10.1016/s0040-4039(01)01728-2
日期:2001.11
An efficient synthesis of an array of 3,4-dihydropyrimidin-2-(1H)-ones using solid-supported ytterbium(III) reagent from aldehydes, 1,3-dicarbonyl compounds and urea (Biginellireaction) under solvent-free conditions is described. Purification of each member of the library was carried out using a cocktail of acid and basic polymer-supported scavengers
Synthesis of Biginelli Compounds Using Cobalt Hydrogen Sulfate
作者:Hamid Reza Memarian、Mahnaz Ranjbar
DOI:10.1002/jccs.201190016
日期:2011.8
Efficient synthesis of various 2‐oxo(thioxo)‐1,2,3,4‐tetrahydropyrimidines containing acetyl, carboethoxy, carbomethoxy and carboxamide groups on 5‐position of the N1‐substituted and N1‐unsubstituted heterocyclic ring was achieved using cobalt hydrogen sulfate Co(HSO4)2 under thermal conditions. Good to high yield, shorter reaction times, easy work up and simple preparation of Co(HSO4)2 are the advantages
Sulfamicacid supported on magnetic Fe3O4 nanoparticles catalyzed the condensation reaction of aldehydes, 1,3-dicarbonyl compounds, and urea or thiourea in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones under solvent-free conditions. This method offers several advantages including high yield, short reaction time, ease of separation, and recyclability of the magnetic catalyst.
磁性Fe 3 O 4纳米粒子上负载的氨基磺酸催化在溶剂-溶剂下合成3,4-二氢嘧啶-2(1 H)-酮/硫酮时醛,1,3-二羰基化合物与脲或硫脲的缩合反应。免费条件。该方法具有几个优点,包括高产率,短反应时间,易于分离和磁性催化剂的可回收性。