CHHANDA MUKHOPADHYAY

Chemistry

A DATTA

B K BANIK

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Dowex 50W in aqueous medium : Highly efficient biginelli condensation procedure for the synthesis of 4-aryl-3,4-dihydropyrimidones

Heterocycles

Three component coupling of an aromatic dialdehyde, a β-keto ester or β-diketone and urea or thiourea (1:2.2:2.5 mol ratios) in one-pot under solvent-free conditions without any catalyst produced the bis-dihydropyrimidones (thiones) in a microwave oven. This is therefore a "green" synthesis of the title compounds under the said conditions. © 2010.

A non-catalyst method for the synthesis of bis-4-aryl-3,4-dihydropyrimidones (thiones) under solvent-free conditions

A very simple, mild, and highly efficient green catalyst has been developed for the synthesis of 2-substituted benzimidazoles by treatment of substituted ortho-phenylenediamines and aldehydes in water at 80C in the presence of boric acid (5 mol-%) and glycerol (0.05 mL). This methodology has been standardized on 55 substrates, and nine new compounds have been synthesized. © 2009 CSIRO.

Australian Journal of Chemistry

Water-mediated synthesis of 2-substituted benzimidazoles by boric acid and glycerol

Only 10 mol% of Dowex 50W in water proved to be a very efficient catalyst for the synthesis of a wide variety of 2-substituted benzimidazoles. The methodology is mild, high yielding, green and the catalyst could be easily recycled. © 2008 Elsevier B.V. All rights reserved.

Catalysis Communications

Dowex 50W: A highly efficient and recyclable green catalyst for the construction of the 2-substituted benzimidazole moiety in aqueous medium

(Chemical Equation Presented) We report here domestic microwave-induced perchloric acid-catalyzed solvent-free synthesis of various 4-aryl-3,4- dihydropyrimidones for the first time. In all the cases the yields are excellent and the mechanism follows a simple Biginelli condensation to produce the dihydropyrimidones in a few seconds. This procedure has been successfully employed to synthesize the mitotic kinesin EG5 inhibitor Monastrol (Figure I).

Journal of Heterocyclic Chemistry

Microwave-induced perchloric acid catalyzed novel solvent-free synthesis of 4-aryl-3,4-dihydropyrimidones via biginelli condensation

Tetrahedron Letters

Microwave-induced bismuth nitrate-catalyzed synthesis of dihydropyrimidones via Biginelli condensation under solventless conditions

Indian Journal of Microbiology

Evaluation of an indigenous ELISA for diagnosis of Johne’s disease and its comparison with commercial kits

One-pot synthesis of dihydropyrimidiones catalyzed by strontium(II) triflate under solvent-free conditions

ChemInform

The Biginelli Dihydropyrimidinone Synthesis

Ammonium chloride-catalyzed one-pot synthesis of 3,4-dihydropyrimidin-2-(1H)-ones under solvent-free conditions

Chemosphere

Indian aerosols: present status

Dowex 50W in aqueous medium: Highly efficient biginelli condensation procedure for the synthesis of 4-aryl-3,4-dihydropyrimidones

Journal	Heterocycles
Publisher	Japan Institute of Heterocyclic Chemistry
ISSN	0385-5414
Open Access	No