An easy access to γ-lactone-fused cyclopentanoids

Faiz Ahmed Khan, Jyotirmayee Dash, Nilam Sahu, Sudheer Chava

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The tricyclic α-keto hemiacetals 3a,b and 8a-d obtained from ruthenium-catalyzed oxidation of tetrahalonorbornyl derivatives possessing a pendant hydroxymethyl group were cleaved using Pb(OAc)4 or alkaline H2O2 to give γ-lactone-fused cyclopentane derivatives 5a,b and 9a-d. The α-keto hemiacetal 3b has also been elaborated to spiroepoxide derivative 25. The stable hydrate 4 formed from ruthenium-catalyzed oxidation of acrolein adduct 10 furnished an intramolecular hemiacetal 11 upon cleavage with Pb(OAc)4. The α-halo ester moiety in 5a was transformed smoothly in a highly regio- and stereoselective manner to α-hydroxy esters through a lactone-assisted intermediate to furnish 18.

Original languageEnglish (US)
Pages (from-to)3783-3787
Number of pages5
JournalJournal of Organic Chemistry
Volume67
Issue number11
DOIs
StatePublished - May 31 2002

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