A facile and efficient one-pot, three-component approach for the synthesis of spirodibenzo[1,4]diazepine derivatives has been achieved by the reaction of isatins, cyclic 1,3-diketones, and 1,2-phenylenediamines in the presence of a Zeolite-Y nanopowder catalyst. The Zeolite-Y nanopowder catalyst was synthesized and characterized thoroughly by using XRD, high-resolution transmission electron microscopy, energy-dispersive spectroscopy, and N2-adsorption analysis. We used X-ray photoelectron spectroscopy to investigate the electronic environment and oxidation state of the elements. © 2018 Wiley-VCH Verlag GmbH &amp; Co. KGaA, Weinheim

CHHANDA MUKHOPADHYAY

Chemistry

K DE

P BHANJA

A BHAUMIK

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

ChemCatChem

A new facile and efficient one-pot three component approach for the preparation of 2, 3, 4-trisubstituted quinolines by (MCM-41)-pyridine catalyzed reaction of easily available substituted isatins and dialkylacetylenedicarboxylates in alcohol has been developed. The (MCM-41)-pyridine nanopowder catalyst has been synthesized and the catalyst has been carefully characterized by various techniques including FT-IR, XRD, HRTEM, EDS, N2-adsorption analysis etc. The materials obtained exhibit high surface area and a narrow distribution of mesoporosity. The key features of this methodology are mild reaction conditions, operational simplicity and facile product separation, high to excellent yields, as well as simple catalyst recovery and reusability. The most exciting feature of this cascade reaction is its mechanism involving the unusual ring opening of an isatin moiety, then recyclisation, aromatization followed by esterification. The synthesized substituted quinolines are expected to be used as lead compounds for the development of new drugs. © 2019 Wiley-VCH Verlag GmbH &amp; Co. KGaA, Weinheim

ChemistrySelect

Mesoporous MCM-41 Silica Supported Pyridine Nanoparticle: A Highly Efficient, Recyclable Catalyst for Expeditious Synthesis of Quinoline Derivatives through Domino Approach

A new method for the synthesis of Spiro dibenzo[b,e][1,4]oxazepines that involves a three-component reaction of isatins, 2-amino phenols and cyclic-1,3-diketones has been developed. This protocol employs Na-Y zeolite nanopowder as a heterogeneous catalyst and does not require the presence of any additivies or strong acid–base condition. Na-Y zeolite nanopowder was synthesized through a simple hydrothermal procedure and it was characterized using different array of shophisticated techniques. Key features of the reaction include a recyclable catalyst and a wide scope of possible substrates. © 2019 John Wiley &amp; Sons, Ltd.

Journal	Data powered by TypesetChemCatChem
Publisher	Data powered by TypesetWiley Blackwell
ISSN	1867-3880
Open Access	No