From: GERALD MORINE, PHONE:218-755-2792 FAX: 4107 (GHMO$##$VAX1.BEMIDJI.MSUS.EDU)
Date: Thu Jun 10 1999 - 00:08:22 EDT
Recently, it was first written on this list:
>> I consider subjecting an (unconjugated) enyne to Rhodium catalyzed
>> cyclopropanation with ethyl diazoacetate. As the triple bond of the
>> enyne suffers attack by the carbenoid thus generated (generating
>> cyclopropenes in reasonable yields), I have considered protecting the
>> triple bond as its dicobalt hexacarbonyl complex.
To which it was replied:
> Cobalt - carbonyl - complexes are used to activate a triple bond -
> could it be the pawson khand reaction?
Perhaps these references might be useful.
L. Jordi, J. M. Viqas, S. Ricart, J. M. Morets.
The Pauson-Khand Reaction on Enynes Bearing a Pentacarbonyl Metal
(Cr, W) Carbene Tether. Organometallics, 16, 2808-2818 (1997).
Sugihara, T.; Yamaguchi, M. Catalytic Pauson-Khand Reactions Promoted by
A Small Amount of 1,2-Dimethoxyethane or water. Synlett 1998, 1384.
Hope this helps,
Gerald Morine
Bemidji State University
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