An investigation regarding the synthesis of 2H-thiopyran compounds from substituted benzaldehydes with sodium sulfide (Na2S10H2O) in aqueous ethanol was carried out. The structural elucidation of the products was performed by spectroscopic methods and in one example as X-ray crystallographic analysis. A plausible mechanistic pathway is also proposed that is entirely different from an earlier report.

A BANERJI

P K BISWAS

D BANDYOPADHYAY

M GUPTA

T PRANGE

A NEUMAN

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

Synthetic Studies on 2H-Thiopyran Compounds: A Reinvestigation of the Reaction Between Benzaldehydes and Sodium Sulfide

Phosphorus, Sulfur and Silicon and the Related Elements

Zeitschrift für Chemie

Zur Synthese unsymmetrischer Carbocyanine aus Formylmethylenbenzopyranen und -thiopyranen

Synthesen von 2H-Thiopyran-2-thionen und 2H-Thiopyran-2-onen

Tetrahedron

Highly diastereoselective cycloaddition reactions of variously substituted 1-thia- and 1-thia-3-aza-buta-1,3-dienes. Synthesis of enantiomerically pure 5,6-dihydro-4H-[1,3]thiazines and 3,4-dihydro-2H-thiopyrans

Phosphorus, Sulfur, and Silicon and the Related Elements

Synthesis of Some New Spirothiopyran Derivatives from the Reaction of 4-Thiopyrylidenemalononitriles with Bidentate and Active Methylene Reagents

Journal of Molecular Structure

Crystal and molecular structure of 2 H -thiopyrans

Synthetic studies on 2H-Thiopyran compounds: A reinvestigation of the reaction between benzaldehydes and sodium sulfide

Journal	Phosphorus, Sulfur and Silicon and the Related Elements
Publisher	TAYLOR & FRANCIS LTD
ISSN	1042-6507