| Abstract
| - A complex formed from dicobalt octacarbonyl and a chiral aryl bisphosphite served as a catalystfor the intramolecular asymmetric Pauson−Khand reaction. Bicyclic cyclopentenones were obtainedin up to 75% enantiomeric excess. For a terminal 1,6-enyne, the incremental enantiomeric excesswas found to increase from 4 to 26% over the course of the reaction. The scope of this process wasexamined for a variety of 1,6- and 1,7-enynes, and a moderate degree of enantioselectivity wasmaintained only in the case of aryl-substituted 1,6-enynes.
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