Synthesis of β-Hydroxy-α,α-difluorosulfonamides from Carbanions of Difluoromethanesulfonamides
作者:Jacob Soley、Scott D. Taylor
DOI:10.1021/acs.joc.1c00378
日期:2021.5.7
The synthesis of β-hydroxy-α,α-difluorosulfonamides was achieved by reacting difluoromethanesulfonamides with KHMDS in the presence of an aldehyde or ketone. The reaction exhibited a dramatic counterion effect with KHMDS or NaHMDS usually giving excellent yields in minutes, while lithium bases gave little or no product. Excellent yields and high diastereomeric ratios were achieved with Nα-benzyl-Nα-phenylfluorenyl
Free radical fluoroalkylation of terminal alkenes and alkynes with iododifluoromethanesulfonamides
作者:JieMing Zhu、Fei Wang、JinBo Hu
DOI:10.1007/s11426-010-4139-0
日期:2011.1
Free radical fluoroalkylation of terminal alkenes and alkynes with iododifluoromethanesulfonamides has been successfully achieved. It was found that both the catalytic amount of sodium dithionite (Na2S2O4) and the stoichiometric amount of triethylborane (Et3B)/air can efficiently initiate the current free-radical atom transfer reaction.