Tetrahedron Letters p. 7701 - 7704 (1992)
Update date:2022-07-30
Topics:
Kabat, Marek M.
Lange, Meinolf
Wovkulich, Peter M.
Uskokovic, Milan R.
An efficient and highly stereoselective synthesis of the A-ring synthon 4 of 1,25(OH)2-vitamin D3 (1) is deascribed.The aldehyde 12, which was used for an intramolecular ene reaction to form the main framework 18, was obtained by two different asymmetric
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