Stereoselective Monofluoromethylation of N-tert-Butylsulfinyl Ketimines Using Pregenerated Fluoro(phenylsulfonyl)methyl Anion
摘要:
Pregeneration of fluoro(phenylsulfonyl)methyl anion (PhSO2CHF-) paves the way for the efficient and highly stereoselective monofluoromethylation of (R)-N-tert-butylsulfinyl ketimines. The stereocontrol mode of the present diastereoselective monofluoromethylation of ketimines is different from the previously known nucleophilic fluoroalkylation of (R)-N-tert-butylsulfinyl aldimines, which suggests that a cyclic six-membered transition state (rather than a nonchelation controlled one) is involved in the current ketimine reaction.
Stereoselective Monofluoromethylation of <i>N-tert-</i>Butylsulfinyl Ketimines Using Pregenerated Fluoro(phenylsulfonyl)methyl Anion
作者:Jun Liu、Laijun Zhang、Jinbo Hu
DOI:10.1021/ol802226k
日期:2008.12.4
Pregeneration of fluoro(phenylsulfonyl)methyl anion (PhSO2CHF-) paves the way for the efficient and highly stereoselective monofluoromethylation of (R)-N-tert-butylsulfinyl ketimines. The stereocontrol mode of the present diastereoselective monofluoromethylation of ketimines is different from the previously known nucleophilic fluoroalkylation of (R)-N-tert-butylsulfinyl aldimines, which suggests that a cyclic six-membered transition state (rather than a nonchelation controlled one) is involved in the current ketimine reaction.