Insight into the mechanism of the reduction of alpha,beta-unsaturated chromium(0) carbenes by NaBH4

Authors
Mancheno, MJ Sierra, MA Gomez-Gallego, M Ramirez, P
Citation
Mj. Mancheno et al., Insight into the mechanism of the reduction of alpha,beta-unsaturated chromium(0) carbenes by NaBH4, ORGANOMETAL, 18(17), 1999, pp. 3252-3254
Citations number
43
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
18
Issue
17
Year of publication
1999
Pages
3252 - 3254
Database
ISI
SICI code
0276-7333(19990816)18:17<3252:IITMOT>2.0.ZU;2-V
Abstract
The reduction of alpha,beta-unsaturated: chromium(0) carbenes 1 and 4 by Na BH4 gives vinyl ethers 2 and / or. allyl ethers 3. Deuterium-labeling studi es demonstrate that the reaction occurs by the initial addition of hydride to the carbene carbon, followed by 1,3-rearrangement of the metal center an d protonation (for complexes 1), or by a new hydride addition on the alleny l intermediate 8, and subsequent protonation (for complexes 4).