Journal
ORGANIC LETTERS
Volume 10, Issue 6, Pages 1195-1198Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol800069z
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gamma,gamma-Difluoroallylboronates have been prepared from trifluoroethanol and utilized for the allylboration of a variety of aldehydes to provide gem-difluorinated homoallylic alcohols. alpha-Chiral aldehydes were allylborated in 4:1-13:1 diastereoselectivity favoring the anti-isomer. A representative series of difluorinated hydroxyl enol ethers were converted to the corresponding alpha,alpha-difluoro-beta-hydroxy ketones. Diastereoselective reduction of one of these to either syn- and anti-1,3-diol was also studied.
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