1.alpha.,24-dihydroxycholecalciferols, novel precursors...

Details 1.alpha.,24-dihydroxycholecalciferols, novel precursors... 1.alpha.,24-dihydroxycholecalciferols, novel precursors...

C - Chemistry, Metallurgy

07

J

260/21, 260/60

C07J 9/00 (2006.01)

Patent

CA 1079718

ABSTRACT This invention relates to novel 1.alpha.,3.beta.,24-trihydroxycholesta-5,7- diene, derivatives thereof and a process for preparing them. The novel 1.alpha.,3.beta.,24-trihydroxycholesta-5,7-diene and derivatives thereof can be converted to novel 1.alpha.,24-dihydroxycholecalciferol expressed by the following formula Image 5 - a) which is useful for controlling the calcium metabolism of warm-blooded animals. The novel 1.alpha.,3.beta.,24-trihydroxycholesta-5,7-diene and derivatives thereof are expressed by the following formula Image (3) wherein R1, R2 and R3 are identical or different and represent a hydrogen atom or a protective group convertible to a hydrogen atom.

319510

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