Abstract:Oxirane derivatives R 0030Strained Azetidinium Ylides: New Reagents for Epoxidation. -Azetidinium ylides, generated by deprotonation of the corresponding azetidinium salts, effect epoxidation of aldehydes (I) and ketones such as (V) in a diastereoselective manner. Tri-and tetrasubstituted epoxides are obtained that are unattainable via classical ammonium ylide chemistry. The trisubstituted oxiranes (III) give rise to an unexpected rearrangement producing pyrrolidin-3-ones having a quaternary carbon center. -(A… Show more
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.