A Simple Preparation of Cyclic Vinylic Bromides (1-Bromocycloalkenes and 1-Bromo-1,5-cyclooctadiene) from 1,2-Dibromocycloalkanes

Article abstract of DOI:10.1055/s-1990-27031

1,2-Dibromocyclopentane, 1,2-dibromocyclohexane, 1,2-dibromocycloheptane, 1,2-dibromocyclooctane, 1,2-dibromocyclododecane, and 5,6-dibromocyclooctene are smoothly dehydrobrominated to the corresponding 1-bromocycloalkenes in good yield using morpholine and dimethyl sulfoxide in benzene or ethanol.