Mori, Ichiro published the artcileStereoselective additions of nucleophilic alkenes to chiral thionium ions, Formula: C15H24S, the publication is Journal of Organic Chemistry (1990), 55(24), 5966-77, database is CAplus.
A convenient one-pot process has been developed for conversion of an aldehyde to an arylthionium ion which can be trapped by a nucleophilic alkene. The stereochem. of the reactions of such chiral and prochiral arylthionium ions with achiral and prochiral nucleophilic alkenes has been studied. The major adducts are those predicted by qual. application of the Cram-Felkin rule. Quant., however, the nature of the thionium aryl group has a marked effect. In reactions between prochiral thionium ions and prochiral enol silanes, good simple (anti) relative stereochem. is observed, especially with enol silane I. Mesitylthionium ions of α-chiral aldehydes react with prochiral enol silanes to give one of the four possible products in predominance. Again, however, enol silane I is found to be a superior reagent, giving II in 97% stereoisomeric purity. The α-methyl-β-arylthio ketones produced in these thionium ion reactions can be transformed by a straightforward process, which includes desulfurization, into chain compounds having anti 1,3-di-Me branches. An iterative application of this scheme can be used to prepare deoxypolypropionate structures.
Journal of Organic Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Formula: C15H24S.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia