Synthesis of 1,4-disubstituted (or 1,4,4-trisubstituted) 2,3,5,6,11-pentaoxabicyclo[5.3.1]undecanes
Abstract
The reaction of a mixture of bicyclic ozonides (trioxolans), carbonyl compounds, and hydrogen peroxide in the presence of catalytic amounts of chlorosulphonic acid gives the corresponding 2,3,5,6,11-pentaoxabicyclo[5.3.1]undecanes in 3–35% yield.