In 2022,Gao, Yanfeng; Mao, Yuanhao; Miao, Zhiwei published an article in Organic Letters. The title of the article was 《Enantioselective 1,3-Dipolar (5+3) Cycloadditions of Oxidopyrylium Ylides and Vinylcyclopropanes toward 9-Oxabicyclononanes》.Recommanded Product: 1774-47-6 The author mentioned the following in the article:
An efficient and mild enantioselective palladium-catalyzed (5+3) cycloaddition of vinylcyclopropanes and oxidopyrylium ylides generated in situ from benzopyranones was developed, in the presence of a chiral PHOX ligand. These reactions afforded various highly functionalized bridged oxa-[3.3.1]carbocycles I [R = H, Me, Et, n-Bu, i-Bu, CH2-t-Bu; R1 = Me, Et, Ar = Ph, 2-furyl, 2-thienyl, etc.] with three stereogenic centers that were challenging to synthesize, in moderate to good yields and enantioselectivities. The experimental process involved the reaction of Trimethylsulfoxonium iodide(cas: 1774-47-6Recommanded Product: 1774-47-6)
Trimethylsulfoxonium iodide(cas: 1774-47-6) is a sulfoxonium salt. It is used to generate dimethyloxosulfonium methylide by reaction with sodium hydride. The latter compound is used as a methylene-transfer reagent, and is used to prepare epoxides.Recommanded Product: 1774-47-6
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com