2,3-Unsaturated enoses. A Pummerer rearrangement route to sugar vinyl sulfides and synthesis of 3-deoxy-3-alkyl/arylsulfinyl pyranosides

Mukherjee, Arunima and Jayaraman, Narayanaswamy (2012) 2,3-Unsaturated enoses. A Pummerer rearrangement route to sugar vinyl sulfides and synthesis of 3-deoxy-3-alkyl/arylsulfinyl pyranosides. In: TETRAHEDRON, 68 (42). pp. 8746-8752.

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Abstract

A Pummerer rearrangement of 2,3-dideoxy-3-alkyl/arylsulfinyl-arabino-hexopyranosides is reported. Treatment of sulfinyl-arabino-hexopyranoside derivatives, obtained through oxidation of the corresponding thio-derivatives, with trifluoroacetic anhydride (TFAA)/pyridine led to a facile formation of 2,3-dideoxy-3-alkyl/arylthio-hex-2-enopyranosides. Upon conversion of sugar vinyl sulfides to vinyl sulfoxides, conjugate addition reactions were conducted with alkoxides, to afford 3-deoxy-3-alkyl/arylsulfinyl pyranosides, in the manno-configuration exclusively. Whereas the conjugate addition reaction did not proceed with ether protecting groups, ester protecting groups and free hydroxyl groups in the sugar vinyl sulfoxide permitted the reaction. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	TETRAHEDRON
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to Elsevier
Keywords:	Conjugate addition; Pummerer rearrangement; Unsaturated sugars; Vinyl sulfides
Department/Centre:	Division of Chemical Sciences > Organic Chemistry
Date Deposited:	07 Jan 2013 10:27
Last Modified:	08 Jan 2013 14:06
URI:	http://eprints.iisc.ac.in/id/eprint/45250

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