Selectivity in Lewis acid-mediated fragmentations of peroxides and ozonides: application to the synthesis of alkenes, homoallyl ethers, and 1,2-dioxolanes †
SnCl4-mediated reaction of ozonides with allyltrimethylsilane: formation of 1,2-dioxolanes
作者:Patrick H. Dussault、Xuejun Liu
DOI:10.1016/s0040-4039(99)01399-4
日期:1999.9
SnCl4-mediated reaction of ozonides (1,2,4-trioxolanes) with allyltrimethylsilane furnishes trimethylsilylmethyl-1,2-dioxolanes via metalated carbonyl oxides. The carbonyl oxides can arise through initial ionization of either the ether or peroxide oxygens.
Ozonolysis reactions of a series of cyclic olefins 1 in the presence of carbonyl compounds 6 provided the corresponding cross-ozonides 42. Further reactions of ozonides 42 with the independently prepared carbonyloxide +CH2-OO− gave diozonides of structure 43. All of the newozonides have been isolated as pure substances and characterized by their 1H- and 13C-NMR spectra.
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.