Efficient and versatile synthesis of A-ring precursors of 1α,25-dihydroxyvitamin D3 and analogues. Application to the synthesis of Lythgoe-Roche phosphine oxide

1. Mouriño, A.
2. Torneiro, M.
3. Vitale, C.
4. Fernández, S.
5. Pérez-Sestelo, J.
6. Anné, S.
7. Gregorio, C.