Regioselective and Enantioselective Addition of Sulfur Nucleophiles to Acyclic α,β,γ,δ-Unsaturated Dienones Catalyzed by an Iron(III)–Salen Complex
作者:Subrata Shaw、James D. White
DOI:10.1021/acs.orglett.5b02280
日期:2015.9.18
The first regioselective, enantioselective conjugate addition of thiols to acyclic α,β,γ,δ-unsaturated dienones at the δ carbon is described. The reaction, catalyzed by a chiral iron(III)-salen complex derived from cis-2,5-diaminobicyclo[2.2.2]octane as the scaffold, provides δ-thia-α,β-unsaturated ketones in high yield and enantioselectivity. The bicyclooctane scaffold of (2R,3R,5R,6R) configuration
General Metal-Free Baeyer–Villiger-Type Synthesis of Vinyl Acetates
作者:Belén Poladura、Ángel Martínez-Castañeda、Humberto Rodríguez-Solla、Ricardo Llavona、Carmen Concellón、Vicente del Amo
DOI:10.1021/ol401143q
日期:2013.6.7
Ozone, a cheap, stable, and nonhazardous oxidizing reagent, transforms alpha,beta-unsaturated ketones of defined stereochemistry into their corresponding vinyl acetates through a Baeyer-Villiger reaction. This process is general and straightforward, tolerating a wide range of functional groups.