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γ-Silyl Group Effect in Hydroalumination and Carbolithiation of Propargylic Alcohols.

✍ Scribed by Kazunobu Igawa; Katsuhiko Tomooka

Publisher
John Wiley and Sons
Year
2006
Weight
39 KB
Volume
37
Category
Article
ISSN
0931-7597

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## Abstract A highly regio‐ and stereoselective intramolecular [1,5]‐hydrogen‐transfer process is described. Treatment of γ‐benzyl‐protected Co~2~(CO)~6~‐α,γ‐acetylenic diols with BF~3~⋅OEt~2~ provides bis‐homopropargylic alcohols. The reaction occurs within seconds, tolerates a wide range of funct