Synthesis 2008(13): 2055-2064  
DOI: 10.1055/s-2008-1067122
PAPER
© Georg Thieme Verlag Stuttgart · New York

Aqueous-Mediated Ring Opening of Epoxides with Oximes: A Rapid Entry into β-Hydroxy Oxime O-Ethers as Potential β-Adrenergic Blocking Agents

Mohammad Navid Soltani Rad*a, Somayeh Behrouza, Manije Dianatb
a Department of Chemistry, Faculty of Basic Sciences, Shiraz University of Technology, Shiraz 71555-313, Iran
Fax: +98(711)7354523; e-Mail: soltani@sutech.ac.ir; e-Mail: nsoltanirad@gmail.com;
b Department of Chemistry, Islamic Azad University, Firouzabad Branch, Firouzabad 74715-117, Iran
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Publikationsverlauf

Received 8 February 2008
Publikationsdatum:
11. Juni 2008 (online)

Abstract

Novel β-hydroxy oxime O-ethers, as potential β-adrenergic blocking agents, were synthesized from the aqueous-mediated (H2O-DMSO, 7:3) O-alkylation of oximes with epoxides in the presence of potassium hydroxide at room temperature. The O-alkylation was regioselective and (E)-oxime ethers were the main products. The results of quantum mechanical studies used to rationalize the experimental outcomes are discussed.

30

The ab initio (6-31G) quantum mechanical calculations were run using Gaussian 98 Version 9.2 software. The semiempirical AM1 and PM3 calculations were run on MOPAC in CS Chem 3D Ultra 8 (CambridgeSoft, 2004) and Hyperchem (Hypercube Inc., Version 7).

32

The separation of (E)- and (Z)-acetophenone oximes was achieved following a procedure in ref. 31.