Synthesis of Fluorinated β-Ketosulfones and <i>gem</i>-Disulfones by Nucleophilic Fluoroalkylation of Esters and Sulfinates with Di- and Monofluoromethyl Sulfones
作者:Chuanfa Ni、Laijun Zhang、Jinbo Hu
DOI:10.1021/jo900320b
日期:2009.5.15
An efficient and practically useful method for the preparation of alpha-functionalized mono- and difluoro(phenylsulfonyl)methanes by using a nucleophilic fluoroalkylation methodology was developed. alpha,alpha-Difluoro-P-ketosulfones, alpha-monofluoro-beta-ketosulfones, and alpha-fluoro disulfones were successfully prepared in excellent yields by nucleophilic fluoroalkylation of esters and sulfinates with PhSO2CF2H and PhSO2CH2F reagents.
Stereoselective [3+2] cycloaddition of N-tert-butanesulfinyl imines to arynes facilitated by a removable PhSO<sub>2</sub>CF<sub>2</sub> group: synthesis and transformation of cyclic sulfoximines
作者:Wenchao Ye、Laijun Zhang、Chuanfa Ni、Jian Rong、Jinbo Hu
DOI:10.1039/c4cc05042h
日期:——
unprecedented [3+2] cycloaddition between N-tert-butanesulfinyl imines and arynes provides a stereoselective method for the synthesis of cyclic sulfoximines. Not only does the difluoro(phenylsulfonyl)methyl group play an important role in facilitating the cycloadditionreaction, it can also be removed or substituted through the transformation of the difluorinated cyclic sulfoximines to cyclic sulfinamides