Tetrahedron Letters p. 2339 - 2342 (1991)
Update date:2022-08-05
Topics:
Wilson, Stephen R.
Venkatesan
Augelli-Szafran
Yasmin
A synthesis of 1,25-dihydroxy-vitamin D3 using a new acetylenic Ring-A precursor is described. Ring-A synthons 4a or 4b can be prepared in homochiral form by a diastereoselective diazoester cyclization.
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