One-pot stereocontrolled cycloalkanone synthesis using 1,3-dithiane 1-oxides
作者:Philip C. Bulman Page、Stephen J. Shutlleworth、Mark B. Schilling、David J. Tapolczay
DOI:10.1016/s0040-4039(00)91839-2
日期:1993.10
Lithium enolates of 2-acyl-1,3-dithiane 1-oxides, generated in one pot from 1,3-dithiane 1-oxide, undergo highly diastereoselective alkylation upon treatment with alkyl iodides; similar in situ treatment of these substrates with diiodoalkanes furnishes the corresponding medium-ring cycloalkanones with extremely high diastereoselectivity and in moderate to good yields.
Cleavage of 1,3-Dithianes via Acid-Catalyzed Hydrolysis of the Corresponding 1,3-Dithianemonooxides
作者:Karsten Krohn、Stephan Cludius-Brandt
DOI:10.1055/s-2008-1067164
日期:2008.8
The hydrolysis of 1,3-dithianes to their parent carbonyl compounds via their corresponding monosulfoxides was systemati- cally investigated. The oxidation of the 1,3-dithianes was carried out in high yields using tert-butyl hydroperoxide. Acid-catalyzedhydrolysis of the monosulfoxides to the carbonyl compounds was then performed in excellent yields. The cleavage reactions were monitored by gas chromatography