Selenosulfonation: boron trifluoride catalyzed or thermal addition of selenosulfonates to olefins. A novel regio- and stereocontrolled synthesis of vinyl sulfones
Polystyrene-Supported Selenosulfonates: Efficient Reagents for Regio- and Stereocontrolled Synthesis of Vinyl Sulfones
作者:Hao Qian、Xian Huang
DOI:10.1055/s-2001-18779
日期:——
Two novel polystyrene-supported selenosulfonates reagents have been developed. As reagents for boron trifluoride catalyzed or AIBN catalyzed addition to olefins were successfully demonstrated and have been used for regioselective synthesis of vinyl sulfones.
Silver Nitrate Catalyzed Sulfonylation of O-Propargyl Alkynes
作者:Paulo H. Menezes、Bárbara G. Sátiro、Igor M. R. Moura、Cláudia L. A. Almeida、Queila P. B. Freitas、Roberta A. Oliveira
DOI:10.1055/a-2205-5806
日期:——
lower-cost metals under environmentally friendly conditions is still a challenge. Herein, we report an efficient strategy for the synthesis of vinyl sulfones from O-propargyl alkynes and sodium salts of sulfinic acids using silver nitrate, an inexpensive and readily available catalyst, under air atmosphere using aqueous conditions. The products were obtained in good to moderate yields, and the mechanism
Nickel-Catalyzed Direct Sulfonylation of Styrenes and Unactivated Aliphatic Alkenes with Sulfonyl Chlorides
作者:Wei-Hao Rao、Ying-Ge Li、Li−Li Jiang、Chang Gao、Yi-Zhuo Wang、Jia-Fan Liu、Fu-Yu Zhou、Guo-Dong Zou、Xinhua Cao
DOI:10.1021/acs.joc.4c00094
日期:2024.7.19
with sulfonylchlorides has been developed using 1,10-phenanthroline-5,6-dione as the ligand. Unactivated alkenes and styrenes including 1,1-, 1,2-disubstituted alkenes can be subjected to the protocol, and a wide range of vinyl sulfones was obtained in high to excellent yields with good functional group compatibility. Notably, the process did not allow the desulfonylation of sulfonylchloride or chlorosulfonylation
Regiocontrolled synthesis of mono-, di-, and trisubstituted cyclohexenones by cycloaddition of vinyl sulfones to 1-methoxy-3-[(trimethylsilyl)oxy]-1,3-butadienes. Conversion of alkenes into effective dienophilic reagents
作者:William A. Kinney、Gary D. Crouse、Leo A. Paquette
DOI:10.1021/jo00173a040
日期:1983.12
An indirect method for engaging unactivated alkenes as effective dienophiles in regioselective Diels-Alder reactions