Tetrahedron Letters p. 1945 - 1948 (1992)
Update date:2022-08-03
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Chen
Crich
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
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