Novel Aerobic Oxidation of Primary Sulfones to Carboxylic Acids
摘要:
Primary alkyl aryl sulfones are converted to the corresponding carboxylic acids in fair to excellent yield through double deprotonation and exposure to atmospheric oxygen. The methodology allows for the convenient synthesis of C-13 labeled carboxylic acids.
Reductive addition to electron-deficient olefins with trivalent iodine compounds
作者:Hideo Togo、Masahiko Aoki、Masataka Yokoyama
DOI:10.1016/s0040-4020(01)88042-x
日期:1993.9
(Diacyloxyiodo)arene was treated with electron-deficientolefins in the presence of hydrogen donor such as 1,4-cyclohexadiene to give the reductive addition products via alkyl radical through the radical decarboxylative pathway in good yields. Moreover, this system was able to generate either alkoxycarbonyl radicals or alkyl radicals with [bis(alkoxyoxalyloxy)iodo]benzene, which was prepared from alcohol
Zn/CuI-Mediated Coupling of Alkyl Halides with Vinyl Sulfones, Vinyl Sulfonates, and Vinyl Sulfonamides
作者:Matthew M. Zhao、Chuanxing Qu、Joseph E. Lynch
DOI:10.1021/jo050500g
日期:2005.8.1
A novel high-yielding Zn/CuI-mediated coupling method of alkylhalides with vinyl sulfones, vinyl sulfonates, and vinyl sulfonamides is described. This protocol is applicable for primary, secondary, and tertiary alkyl iodides and bromides. Alkyl chlorides and aryl and vinyl halides were unreactive under the reaction conditions. Formamide was found to be a superior solvent for obtaining high yields
Reductive Addition of Alkyl Radical to Phenyl Vinyl Sulfone
作者:Hideo Togo、Masahiko Aoki、Masataka Yokoyama
DOI:10.1246/cl.1992.2169
日期:1992.11
Radicals generated from (diacyloxyiodo)benzene readily added to phenyl vinylsulfone to give 2-alkylethyl phenyl sulfone in the presence of a hydrogen donor such as 1,4-cyclohexadiene, 1,3-dioxolane, or triethylsilane. Among these donors, 1,4-cyclohexadiene was the most effective.
Hydrosulfonylation of Unactivated Alkenes by Visible Light Photoredox Catalysis
作者:Juan-Juan Wang、Wei Yu
DOI:10.1021/acs.orglett.9b03636
日期:2019.11.15
hydrosulfonylation of unactivated alkenes with sodium sulfinates was realized via [Ir(dF(CF3)ppy)2(dtbbpy)]PF6-mediated visiblelightphotoredoxcatalysis. The presence of an acid such as acetic acid is essential for the reaction to take place. A variety of unactivated alkenes can be transformed into sulfones with good yield and high regioselectivity using this reaction, which is proposed to proceed by a radical
The invention relates to inhibitors of Sphingosine Kinase enzymatic activity, and methods of treating diseases and disorders by administering inhibitors of Sphingosine Kinase enzymatic activity.