An efficient enantioselective synthesis of 1α,25-dihydroxyvitamin D3 A-ring synthon
作者:Masakazu Koiwa、Georges P.J Hareau、Fumie Sato
DOI:10.1016/s0040-4039(00)00170-2
日期:2000.4
The asymmetric synthesis of the A-ring of 1α,25-dihydroxyvitaminD3, (Z)-2, from 5-tert-butyldimethylsiloxy-2-cyclohexenone [(S)-1], is described where an intramolecular lactonization using cat. scandium triflate is the key reaction.