Tin(IV) Chloride-Chiral Pyrogallol Derivatives as New Lewis Acid-Assisted Chiral Brønsted Acids for Enantioselective Polyene Cyclization
- 1 July 2004
- journal article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 6 (15) , 2551-2554
- https://doi.org/10.1021/ol049126h
Abstract
[reaction: see text] New Lewis acid-assisted Brønsted acids (LBAs), tin(IV) chloride-2,6-dialkoxyphenols, serve as artificial cyclases for biomimetic polyene cyclization. For example, the enantioselective cyclization of 4-(homogeranyl)toluene using tin(IV) chloride-2,6-di[(1'R,2'R)-trans-2'-(3' ',5' '-xylyl)cyclohexanoxy]phenol gave a trans-fused tricyclic compound with 85% ee.Keywords
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