An Alternative to the Arbuzov Reaction: Generation and Transformation of α-Dialkyl-Substituted Methylphosphonate Carbanions via an SET Reduction Process
作者:Li Zhang、Yewen Fang、Jianxun Shi
DOI:10.1055/a-1959-2742
日期:2023.3
B-alkyl-9-borabicyclo[3.3.1]nonane (B-alkyl-9-BBN). Using the α-alkylethenylphosphonates as radical acceptors, visible-light-driven photocatalytic Giese-type and cyclopropanation reactions based on reductive radical-polar crossover have been successfully developed. The redox-neutral photocatalysis serves as a viable strategy for the preparation of various 1,1-dialkyl-substituted methylphosphonates and
Direct Hydrofluorination of Methallyl Alkenes Using a Methanesulfonic Acid/Triethylamine Trihydrofluoride Combination
作者:Xavier Bertrand、Jean-François Paquin
DOI:10.1021/acs.orglett.9b03950
日期:2019.12.6
The use of a methanesulfonic acid/triethylamine trihydrofluoride combination for the direct hydrofluorination of methallyl-containing substrates is reported. Under those metal-free conditions that use readily available, cheap, and easy to handle reagents, a range of methallyl alkenes could be converted to their corresponding tertiary fluoride in up to 78% yield. Finally, a promising result for the