New synthesis of sulphides from vinylic ethers. Application to the syntheses of 3-alkylsulphenyl-, 3-alkylsulphinyl- and 3-alkylsulphonyl- piperidinium chlorides

1. Ibarra, C.A.
2. Cuervo, R.
3. Fernández-Monreal, M.C.
4. García, M.
5. Ruiz, M.P.
6. Eliel, E.L.