axial face on sequential reaction of 1 with alkyllithiums, copper iodide-dimethyl sulfide and allyl bromides and (ii) from the equatorlal face on reaction with allylstannanes or -silanes in the presence of a Lewis acid. The synthesis of 1-selenocyclohexane has been achieved from 1 via the “carbanionic route” or with tin hydride through a “radical route”. The former reaction leads selectively to the