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Direct Conversion of Aldehydes and Ketones to Allylic Halides by a NbX(5-)[3,3] Rearrangement
Journal article   Open access   Peer reviewed

Direct Conversion of Aldehydes and Ketones to Allylic Halides by a NbX(5-)[3,3] Rearrangement

Fraser F Fleming, P C Ravikumar and Lihua Yao
Synlett, v 2009(7), pp 1077-1080
2009
PMID: 20046989
url
https://europepmc.org/articles/pmc2709853View
Accepted (AM)Open Access (License Unspecified) Open

Abstract

Sequential addition of vinylmagnesium bromide and NbCl(5), or NbBr(5), to a series of aldehydes and ketones directly provides homologated, allylic halides. Transposition of the intermediate vinyl alkoxide is envisaged through a metalla-halo-[3,3] rearrangement with concomitant delivery of the halogen to the terminal carbon. The [3,3] rearrangement is equally effective for the conversion of a propargyllic alcohol to the corresponding allenyl bromide.

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Web of Science research areas
Chemistry, Organic
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