Induction of Olefin Metathesis by Acetylenes.
Abstract
Acetylenes induce (phenylmethoxycarbene) pentacarbonyltungsten to initiate metatheses of cis-2-pentene, cyclooctene, cycloheptene, and cyclopentene, but too much quenches the reactions. The first three of these transformations are remarkably stereoselective, yielding olefins that are 94 to 97% cis. These observations accord with the hypothesis that Scheme 1 is the mechanism of acetylene polymerization. They also provide a functional equivalent (an acetylene) of the organometallic cocatalysts like ethylaluminum dichloride, unique in operating in the absence of strong Lewis acid metal-halides. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 20, 1980
- Accession Number
- ADA092912
Entities
People
- Edward B. Savage
- Mridula Nair
- Steven J. Lee
- Thomas J. Katz
Organizations
- Columbia University