Synthesis of 3-oxatricyclo[4.4.0.02,7]decene derivatives
摘要:
saturated haloethers of norpinane structure were prepared by reaction of N-iodo- and N-bromo-succinimides with 1-phenyltricyclo[4. 1.0.0(2.7)] -heptane in the presence of unsaturated propargyl or allyl alcohol. The iodoproparayloxy derivative underwent reductive 6-exo-cyclization when treated with tributyltin hydride resulting in 5-methylene-3-oxa-2-phenyltricyclo[4.4.0.0(2.7)]decane, and the iodoallyloxy derivative on heating in the presence of benzoyl peroxide suffered isomerization into 5-iodomethyl-3-oxa-2-phenyltricyclo[4.4.0.0(2.7)]decene. Bromopropargyloxy and bromoallyloxy derivatives failed to undergo the reductive cyclization under the treatment with a system cobaloxime(III)-sodium borohydride, but suffered hydrogenetion at the multiple carbon-carbon bond.
Synthesis of 3-oxatricyclo[4.4.0.02,7]decene derivatives
摘要:
saturated haloethers of norpinane structure were prepared by reaction of N-iodo- and N-bromo-succinimides with 1-phenyltricyclo[4. 1.0.0(2.7)] -heptane in the presence of unsaturated propargyl or allyl alcohol. The iodoproparayloxy derivative underwent reductive 6-exo-cyclization when treated with tributyltin hydride resulting in 5-methylene-3-oxa-2-phenyltricyclo[4.4.0.0(2.7)]decane, and the iodoallyloxy derivative on heating in the presence of benzoyl peroxide suffered isomerization into 5-iodomethyl-3-oxa-2-phenyltricyclo[4.4.0.0(2.7)]decene. Bromopropargyloxy and bromoallyloxy derivatives failed to undergo the reductive cyclization under the treatment with a system cobaloxime(III)-sodium borohydride, but suffered hydrogenetion at the multiple carbon-carbon bond.