25-hydroxy-24-oxocholestane derivatives and preparation thereof

Details 25-hydroxy-24-oxocholestane derivatives and preparation thereof 25-hydroxy-24-oxocholestane derivatives and preparation thereof

C - Chemistry, Metallurgy

07

J

260/21, 260/60

C07J 9/00 (2006.01) C07J 17/00 (2006.01)

Patent

CA 1138859

ABSTRACT OF THE DISCLOSURE This invention relates to novel 25-hydroxy-24- oxocholestane derivatives and a process for preparing them. The novel 25-hydroxy-24-oxocholestane derivatives of this invention can easily be converted to 24,25- dihydroxycholecalciferol or 1a,24,2s-trihydroxychole- calciferol which is known as useful for controlling the calcium metabolism of warm-blooded animals. Moreover, 25-hydroxy-24-oxocholestane deriva- tives can be converted to novel 25-hydroxy-24-oxochole- calciferol expressed by the following formula Image and novel 1.alpha.,25-dihydroxy-24-oxocholecalciferol of the formula Image which are useful medicines. The new 25-hydroxy-24-oxocholestane derivatives of the present invention are very useful as inter- mediates for the synthesis of a variety of active vitamin D3.

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