Pospelov,M.V. et al., Journal of Organic Chemistry USSR (English Translation), 1973, vol. 9, p. 312 - 316
作者:Pospelov,M.V. et al.
DOI:——
日期:——
Diastereoselectivity of Additions to Chiral Carbonyl Oxides
作者:Patrick H. Dussault、Umesh R. Zope
DOI:10.1021/jo00130a021
日期:1995.12
The influence of a resident stereocenter on the formation of hydroperoxy acetals from carbonyl oxides is investigated. Addition of either methanol or 2-propanol to 8-phenylpropanal O-oxide proceeds with modest stereoselectivity; addition of a tertiary alcohol proceeds with higher selectivity. Product stereochemistry, which is confirmed by conversion of a functionalized hydroperoxy acetal to a 1,2-dioxane, is found to derive from nucleophilic attack through a Felkin-Anh type transition state. Trapping of a carbonyl oxide containing a neighboring hydrogen bond donor proceeds with modest selectivity for both syn- and anti-carbonyl oxide isomers. Ozonolysis of a 3-(trialkylstannyl)-1-enol ether proceeds with loss of the stannyl-bearing carbon through the possible intermediacy of a vinyl peroxide.