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.
Catalytic asymmetric addition to cyclic <i>N</i>-acyl-iminium: access to sulfone-bearing contiguous quaternary stereocenters
作者:Viraj A. Bhosale、Ivana Císařová、Martin Kamlar、Jan Veselý
DOI:10.1039/d2cc02667h
日期:——
Herein, we report the first chiral phosphoric acid (CPA)-catalyzed asymmetric addition of α-fluoro(phenylsulfonyl)methane (FSM) derivatives to in situ generated cyclic N-acyliminium. This process enables metal-free expeditious access to sulfone and fluorine incorporating contiguous all substituted quaternarystereocenters ingrained in biorelevant isoindolinones in excellent stereoselectivities (up
在这里,我们报告了第一个手性磷酸(CPA)催化的α-氟(苯磺酰基)甲烷(FSM)衍生物与原位生成的环状N-酰基亚胺的不对称加成。该工艺能够以优异的立体选择性(高达 99% ee 和高达 50:1 dr),快速获得无金属的砜和氟,并结合在生物相关异吲哚啉酮中根深蒂固的连续所有取代的四元立体中心。