Tetrahedron Letters p. 3617 - 3620 (1984)
Update date:2022-08-04
Topics:
Hatakeyama, Susumi
Numata, Hirotoshi
Takano, Seiichi
The cyclopentanone 3a, a key intermediate in the synthesis of vitamin D3 and its metabolites, has been prepared in optical active form using (S)-γ-trityloxymethyl-γ-butyrolactone (6) as a chiral building block.
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