Reagent controlled addition of chiral sulfur ylides to chiral aldehydes

Varinder K. Aggarwal*, Jie Bi

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

6 Citations (Scopus)

Abstract

The degree of reagent and substrate control in the reaction of chiral sulfur ylides with chiral aldehydes has been investigated. Specifically, the reactions of the two enantiomers of the chiral benzyl sulfonium salt I with glyceraldehyde acetonide were studied in detail. Of the two new stereogenic centers created, it was found that the C-1 stereochemistry was largely controlled by the reagent, whereas control at the C-2 center was dependent on the aldehyde used. In one case, the trans isomer was produced via reversible formation of the intermediate betaine, whereas in the alternative case, the C-2 center was under Felkin Anh/Cornforth control through non-reversible formation of the betaine. Thus, the aldehyde stereocenter influenced the degree of reversibility in betaine formation, which impacted on the stereocontrol at the C-2 position.

Original languageEnglish
Article number4
Number of pages4
JournalBeilstein Journal of Organic Chemistry
Volume1
DOIs
Publication statusPublished - 26 Aug 2005

Keywords

  • EPOXIDATION REACTIONS
  • MEDIATED EPOXIDATION

Cite this