25-carboxylic acid derivatives in the vitamin d series,...

Details 25-carboxylic acid derivatives in the vitamin d series,... 25-carboxylic acid derivatives in the vitamin d series,...

C - Chemistry, Metallurgy

07

C

C07C 401/00 (2006.01) A61K 31/59 (2006.01)

Patent

CA 2146429

Described are the new 25-carboxylic acid derivatives of general formula (I), (see formula I) R19 and R19a each denoting a hydrogen atom or in common an exocyclic methyl group, R21 and R21a independently of each other denoting a hydrogen atom, a chlorine or fluorine atom, an alkyl group with 1-4 carbon atoms, in common a methylene group, a 3-7 membered, saturated or unsaturated carbocyclic ring in common with the quaternary 20 carbon atom, Y preferably denoting a derivatized carboxyl residue, with the other substituents as indicated in the description, and a method of producing them. The new compounds possess vitamin D activity as well as anti-proliferative and cell-differentiating action and can be used in the manufacture of medicines.

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