One-pot palladium-catalyzed synthesis of sulfonyl fluorides from aryl bromides
作者:Alyn T. Davies、John M. Curto、Scott W. Bagley、Michael C. Willis
DOI:10.1039/c6sc03924c
日期:——
A mild, efficientsynthesis of sulfonyl fluorides fromaryl and heteroaryl bromides utilizing palladium catalysis is described. The process involves the initial palladium-catalyzed sulfonylation of arylbromides using DABSO as an SO2 source, followed by in situ treatment of the resultant sulfinate with the electrophilic fluorine source NFSI. This sequence represents the first general method for the
Nickel(II)-Catalyzed Synthesis of Sulfinates from Aryl and Heteroaryl Boronic Acids and the Sulfur Dioxide Surrogate DABSO
作者:Pui Kin Tony Lo、Yiding Chen、Michael C. Willis
DOI:10.1021/acscatal.9b04363
日期:2019.12.6
We report a redox-neutral Ni(II)-catalyzed sulfination of readily available aryl and heteroaryl boronicacids. Using the combination of commercially available, air-stable NiBr2·(glyme), a commercially available phenanthroline ligand, and DABSO, boronicacids are efficiently converted to the corresponding sulfinate salts, which can be further elaborated to valuable sulfonyl-containing groups, including
Using a simple copper(I) catalyst has allowed a high yielding sulfonylative-Suzuki–Miyaura cross-coupling reaction to be developed. The process provides a single step route to diaryl sulfones from the direct combination of aryl boronic acids, sulfur dioxide and aryl iodides, and represents the first sulfonylative variant of a classic cross-coupling reaction. Sulfur dioxide is delivered from the surrogate
One-pot fluorosulfurylation of Grignard reagents using sulfuryl fluoride
作者:Cayo Lee、Nicholas D. Ball、Glenn M. Sammis
DOI:10.1039/c9cc08487h
日期:——
Herein, we report a new method for the one-pot syntheses of sulfonyl fluorides. Addition of an alkyl, aryl, or heteroaryl Grignard to a solution of sulfuryl fluoride at ambient temperature affords the desired sulfonyl fluorides in 18-78% yield. Furthermore, this method is applicable for in situ sequential reactions, whereby the Grignard reagent can be converted to the corresponding diarylsulfone, sulfonate