Erbium(III) Triflate is a Highly
Efficient Catalyst for the Synthesis of β-Alkoxy
Alcohols, 1,2-Diols and β-Hydroxy Sulfides by Ring Opening
of Epoxides

doi:10.1055/s-0029-1216956

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Synthesis 2009(20): 3433-3438
DOI: 10.1055/s-0029-1216956

PAPER

Erbium(III) Triflate is a Highly Efficient Catalyst for the Synthesis of β-Alkoxy Alcohols, 1,2-Diols and β-Hydroxy Sulfides by Ring Opening of Epoxides

Renato Dalpozzo^a, Monica Nardi*^a, Manuela Oliverio^b, Rosina Paonessa^b, Antonio Procopio^b
^a Dipartimento di Chimica, Università della Calabria, ponte Bucci cubo 12/c, 87030 Arcavacata di Rende (Cs), Italy, Fax: +39(0984)493077; e-Mail: nardi@unical.it;
^b Dipartimento Farmacobiologico, Università della Magna Graecia, Complesso Ninì Barbieri, 88021 Roccelletta Di Borgia (CZ), Italy

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Publication History

Received 25 May 2009
Publication Date:
21 August 2009 (eFirst)

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Abstract

Chemo- and stereoselectivity in the ring-opening reaction of epoxides with erbium(III) triflate are described. Epoxides can be cleaved under neutral conditions with alcohols and thiols in the presence of catalytic amounts of Lewis acid, affording the corresponding β-alkoxy alcohols and β-hydroxy sulfides in high yields. In water, epoxide ring opening occurs to produce the corresponding diols in good yields

Key words

epoxides - Lewis acids - nucleophilic additions - ring opening - green chemistry