One carbon elongation of the Hajos-Parrish ketone. synthesis of (+)-(3aS, 7aR)-octahydro-3a-hydroxy-7a-methyl-1-methylene-5h-indene-5-one

1. Medarde, M.
2. Caballero, E.
3. Tomé, F.
4. Gracia, P.G.
5. Boya, M.
6. San Feliciano, A.