Aryldiazonium Salts and DABSO: A Versatile Combination for Three‐Component Sulfonylative Cross‐Coupling Reactions
作者:Pritha Das、Subhodeep Das、Ranjan Jana
DOI:10.1002/asia.202200085
日期:2022.6
A catalyzed synthesis of diarylsulfones with arylboronic acids and catalyst-free synthesis of arylvinyl and alkylvinyl sulfonesfromvinyl bronic acids or halides is reported.
Isomerization-Free Sulfonylation and Its Application in the Synthesis of PHA-565272A
作者:Thomas J. Fleck、Jiong Jack Chen、Cuong V. Lu、Kari J. Hanson
DOI:10.1021/op050208a
日期:2006.3.1
FeCl3 catalyzed an isomerization-free Friedel-Crafts sulfonylation between 1-naphthalenesulfonyl chloride and halobenzenes. The coupled halide was then displaced using 35% hydrazine in DMSO to provide the Fischer indole precursor. Pure 5-chloro-2-pentanone was the key for a successful Grandberg modification of Fischer indole synthesis that effectively constructed both the indole core and side chain of the target molecule. The development of these methods enabled a rapid preparation of kilogram quantities of PHA-565272A.