Lithium Bromide-Catalyzed Highly Chemoselective and Efficient Dithioacetalization of α,β-Unsaturated and Aromatic Aldehydes under Solvent-Free Conditions

Habib Firouzabadi; Nasser Iranpoor; Babak Karimi

doi:10.1055/s-1999-3679

Synthesis 1999; 1999(1): 58-60
DOI: 10.1055/s-1999-3679

short paper

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Lithium Bromide-Catalyzed Highly Chemoselective and Efficient Dithioacetalization of α,β-Unsaturated and Aromatic Aldehydes under Solvent-Free Conditions

Habib Firouzabadi^* , Nasser Iranpoor, Babak Karimi

^*Chemistry Department, College of Sciences, Shiraz University, Shiraz 71454, Iran; Fax +98(71)2 00 27

Abstract

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Chemoselective dithioacetalization of aromatic- and α,β-unsaturated aldehydes in the presence of other structurally different aldehydes and ketones was achieved efficiently in the presence of catalytic amounts of LiBr under solvent-free conditions. Due to the neutral reaction conditions, this method is compatible with acid sensitive substrates.

dithioacetalization - thioacetals - lithium bromide - solvent-free conditions - 1,3-dithianes - 1,3-dithiolanes

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