A General Procedure for Intramolecular α‐<i>tert</i>‐Alkylation of Carbonyl Compounds

Abstract

Mono- and bicyclic as well as spirocyclic carbonyl compounds can be prepared by intramolecular tert-alkylation of olefins such as (1) with SnCl4. An O-stannyl derivative and a carbenium ion are probably intermediates in the reaction, which should find application in terpene and steroid syntheses.