Copper-Catalyzed Decarboxylative Disulfonylation of Alkynyl Carboxylic Acids with Sulfinic Acids
作者:Hong Fu、Jia-Qi Shang、Tao Yang、Yuehai Shen、Chuan-Zhu Gao、Ya-Min Li
DOI:10.1021/acs.orglett.7b03922
日期:2018.1.19
A copper-catalyzed decarboxylative disulfonylation of alkynyl carboxylic acids with sulfinicacids in aqueous solution has been developed. The reaction provides a straightforward and practical access to (E)-1,2-disulfonylethenes, which are important building blocks in synthetic organic chemistry, and exhibits a good functional group tolerance and excellent stereoselectivity. A possible mechanism for
The treatment of alkynylselenonium salt with benzenesulfinic acid in iPrOH gives (Z)-β-sulfonylvinylselenonium salts in good yields. The alkenylselenonium salts thus prepared react with nucleophiles such as alkoxides, halides, and acetylides to produce β-functionalized (Z)-vinyl sulfones in high yields. Furthermore, we succeeded in the simple stereoselective one-step synthesis of various chiral (Z)-β-alkoxyvinyl sulfones by the use of chiral alcohols.
Alkynylselenonium salts 2 and 5 were synthesized and treated with benzenesulfinic acid or its sodium salt in an alcohol. The reactions with sodiumbenzenesulfinate gave (Z)-β-alkoxyvinylsulfones 6 as main products, while the reactions with benzenesulfinic acid afforded the β-sulfonylvinylselenonium salts 11 and 12 in good yields.
Nucleophilic vinylic substitutions of (Z)-(β-(phenylsulfonyl)-alkenyl)iodonium tetrafluoroborates with sodium benzenesulfinate: Stereoselective synthesis of (Z)-1,2-bis(phenylsulfonyl)alkenes
作者:Masahito Ochiai、Kunio Oshima、Yukio Masaki、Munetaka Kunishima、Shohei Tani
DOI:10.1016/s0040-4039(00)74100-1
日期:1993.7
Nucleophilicvinylicsubstitutions of (Z)-(β-(phenylsulfonyl)alkenyl)iodonium tetrafluoroborates with sodium benzenesulfinate afford (Z)-1,2-bis(phenylsulfonyl)alkenes with retention of stereochemistry in good yields.