The effect of Lewis acids on the pinacol homocoupling reaction of aldehydes promoted by samarium diiodide

Citation
R. Annunziata et al., The effect of Lewis acids on the pinacol homocoupling reaction of aldehydes promoted by samarium diiodide, EUR J ORG C, (12), 1999, pp. 3369-3374
Citations number
31
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
ISSN journal
1434193X → ACNP
Issue
12
Year of publication
1999
Pages
3369 - 3374
Database
ISI
SICI code
1434-193X(199912):12<3369:TEOLAO>2.0.ZU;2-V
Abstract
The effect of various Lewis acids on the samarium diiodide promoted pinacol homocoupling of aldehydes was investigated. The reaction of benzaldehyde p roceeded with fair to good 1,2-anti-stereoselectivity, while in the case of other aromatic and aliphatic aldehydes syn-stereoselectivity was generally observed. Chiral alpha-alkylaldehydes allowed for an almost complete stere ocontrol favoring syn-1,2-diols.