127491-99-0Relevant articles and documents
The Cyclization Route to the Calcitriol A-ring: A Formal Synthesis of (+)-1α,25-Dihydroxyvitamin D3
Chen, Chen,Crich, David
, p. 7943 - 7954 (1993)
An efficient asymmetric synthesis of the A-ring of 1α,25-dihydroxyvitamin D3 from α-bromoacrolein is described.The key steps of the synthesis are the Evans type syn-selective asymmetric aldol reaction of bromoacrolein with the boron enolate of
Asymmetric total synthesis of an a-ring precursor to hormonally active 1α,25-dihydroxyvitamin D3
Posner,Kinter
, p. 3967 - 3969 (2007/10/02)
A new sulfinyl orthoester has been designed and used effectively in one-flask syntheses of dienoate esters from allylic alcohols; this new method as well as a highly stereocontrolled [2 + 4]-cycloaddition are applied to synthesis of 1α,25-dihydroxyvitamin D3.