Enantioselective synthesis of 24,25-dihydroxy vitamin D3 northern portion from (S)-3-hydroxy-2,2-dimethylcyclohexane-1-one. Remote asymmetric induction in an acid-catalysed conjugate addition

Article abstract of DOI:10.1016/S0040-4039(97)10647-5

Enantioselective synthesis of building blocks, 2 and 16, for 24,25-dihydroxy- and 25-hydroxy vitamin D synthesis, respectively, from easily accessible optically active hydroxy ketone 5, is described.