Preparation of fluorine-modified 25-hydr
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Takeo Taguchi; Ryoichi Namba; Masakazu Nakazawa; Masaharu Nakajima; Yumiko Nakam
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Article
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1988
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Elsevier Science
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French
โ 263 KB
Preparations of the titled fluorinated vltamln D 2 analogs (2, 2 and 2) were efflclently achieved through reactions of the C22 -aldehyde C,$) with phenylsulfone derivatives (z, ,8 and 2). As in the case of vitamin D 3\*l it was demonstrated that vitamin D2 must be metabolically hydroxylated at C-25