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Chemistry100%

Selected Abstracts

An efficient and facile synthesis of pyrimidine and quinazoline derivatives via one-pot three-component reaction under solvent-free conditions

JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 2 2009
Liangce Rong
An efficient and convenient method for the preparation of pyrimidine and quinazoline derivatives by the one-pot reaction of aromatic aldehydes, cyclic ketones and guanidine carbonate, in the presence of sodium hydroxide under solvent-free condition was reported. This method has the advantages of excellent yields, mild reaction conditions, easy work-up, and being environmentally friendly over the existing procedures. J. Heterocyclic Chem., (2009). [source]

Oxalic acid as a versatile catalyst for one pot facile synthesis of 3,4-dihydropyrimidin-2-(1H)-ones and their thione analogues

JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 4 2008
Jaiprakash N. Sangshetti
3,4-Dihydropyrimidin-2-(1H)-ones and their thione analogues are synthesized from the condensation of aromatic aldehydes, ,-dicarbonyl compound and urea or thiourea in presence of 5 mol% of oxalic acid in ethanol-water (1:2; v/v) under mild reaction conditions. The yields obtained are better and also the use of very inexpensive catalyst, environmentally benign solvent and easy work-up are the advantageous aspects of the present method. [source]

ChemInform Abstract: Synthesis of Dihydroindoles and Tetrahydroquinolines by the Intramolecular Diels,Alder Reaction of N-Alkenylated 2-Acylamino-3-furancarbonitriles.

CHEMINFORM, Issue 43 2010
Hiroshi Maruoka
Abstract The procedure for the preparation of the title compounds, e.g. (IV), has the advantage of an easy work-up. [source]

Sulfamic Acid as a Green and Reusable Catalyst for the Preparation of , -Enaminones

CHINESE JOURNAL OF CHEMISTRY, Issue 7 2009
Lei WANG
Abstract Sulfamic acid can effectively catalyze the reaction of ( -diketones with arylamines to afford the , -enaminones. The present method offers several advantages, such as high yield, short reaction time, mild conditions, easy work-up and catalyst recyclability. [source]