Tandem ROMP−Hydrogenation with a Third-Generation Grubbs Catalyst

Tandem ROMP−hydrogenation enables efficient access to saturated, functionalized “ROMP polyolefins”. Of the Grubbs-class initiators 1−3, only third-generation catalyst 3 enables efficient ROMP of sterically demanding norbornenes with precise specification of chain lengths. Unlike 1 and 2, however, 3...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2007-04, Vol.129 (14), p.4168-4169
Main Authors: Camm, Kenneth D, Martinez Castro, Nemesio, Liu, Yuwen, Czechura, Pawel, Snelgrove, Jennifer L, Fogg, Deryn E
Format: Article
Language:English
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Summary:Tandem ROMP−hydrogenation enables efficient access to saturated, functionalized “ROMP polyolefins”. Of the Grubbs-class initiators 1−3, only third-generation catalyst 3 enables efficient ROMP of sterically demanding norbornenes with precise specification of chain lengths. Unlike 1 and 2, however, 3 decomposes rapidly during subsequent hydrogenation. By trapping the propagating species with PCy3 immediately following ROMP, we generate a Ru-terminated chain identical to that formed from 2 and exhibiting equivalent hydrogenation activity. The remarkable ROMP efficiency of 3 can thus be integrated with the high hydrogenation activity of 2, providing efficient access to chain-length-precise, functionalized polyolefins.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja071047o