The Pauson-Khand Reaction: the Catalytic Age Is Here

Whilst on the subject of the Pauson-Khand reaction, a review of catalytic versions of the reaction that have been developed over the last 2-3 years has come out recently.  The review also includes up to date references on asymmetric variants on the process such as those shown below which was developed by Buchwald and Hicks, and Shibata and Tagaki respectively.  (Angew. Chem. Internat. Ed., 2003, 44, 1800-1810).