Addition reactions O 0060Trans Dialkoxylation of Cyclic Alkenes: A Prevost-Type Reaction. -The one-step method for trans-1,2-dialkoxylation of cyclic alkenes occurs via initial formation of the trans-iodoethers, which undergo Ag-assisted iodide abstraction to afford the trans-diethers. The combination of silver perchlorate, collidine, and iodine in 2:1:1 molar ratio is of importance, since this mixture is effective for conversion of cyclic alkenes to trans-diethers. Cyclic alkenes possessing unsubstituted carbon-carbon double bonds provide diethers in high yields and purity while alkenes with trisubstituted double bonds furnish lower yields of diethers, accompanied by side products. -

For Abstract see ChemInform Abstract in Full Text.