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Preparation of desmosterol from fucosterol

, : Preparation of desmosterol from fucosterol. Chemical and Pharmaceutical Bulletin (Tokyo) 24(8): 1928-1931

Desmosteryl acetate, a useful key intermediate for synthesis of metabolites of vitamin D3, was synthesized from fucosterol by 2 routes: 24, 28-epoxyfucosteryl acetate was treated with solid acids such as zeolite, silica-alumina and alumina-boria to give desmosteryl acetate in a yield of 16%-40%; dehydration of 24-hydroxycholesteryl acetate, which was obtained by ozonolysis of fucosteryl acetate followed by reduction with sodium borohydride with P2O5 in benzene afforded desmosteryl acetate in a yield of 85%.

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Accession: 006173031

DOI: 10.1248/cpb.24.1928

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