Asymmetric Induction in Stereoselective Carbocyclization of Cyclohexanone Enamines
作者:Eugenius Butkus、Arvydas Stončius
DOI:10.1055/s-1999-2569
日期:1999.2
enantioselective synthesis of bicyclo[3.3.1]nonane diketones 3-5 was accomplished by (S)and (R)-2methoxymethylpyrrolidine induced asymmetric cyclization of cyclohexanoneenamines 1,2 in reaction with propenoyl chloride. A possible enantiodifferentiation reaction mechanism was suggested.
Stereoselective Baeyer–Villiger oxidation of some bridged bicyclic diketones
作者:Eugenius Butkus、Sigitas Stončius
DOI:10.1039/b103564a
日期:——
The regioselectivity of the Baeyer–Villigeroxidation of bicyclo[3.3.1]nonane and bicyclo[2.2.2]octane ketones 1–7 with carbonyl groups located at different positions and bearing other substituents in the bicyclic ring is studied. The impact of the formation of the tetrahedral intermediate and the ring-bond migratory aptitude are considered as major factors governing the reaction's regioselectivity