Hétérocyclisation intramoléculaire par réaction d'oxymercuration. II. Oxymercuration intramolécuxlaire des allyl-2 cyclohexanols cis et trans

The intramolecular oxymercuration of two isomeric 2-allyl-cyelohexanols, has been realized with different mercuric salts. The reaction is always regiospecific, but not stereoselective, and leads to five membered mercurated heterocyclic. The reduction of organomercury compounds obtained from trans-2-allylcyclo-hexanol leads, in some cases, to a ring rearrangement, that permit us to obtain from the trans cyclised product, under different conditions either pyran or furan compounds.