17,20-epoxide derivatives of pregnane, their preparation and...

Details 17,20-epoxide derivatives of pregnane, their preparation and... 17,20-epoxide derivatives of pregnane, their preparation and...

C - Chemistry, Metallurgy

07

J

C07J 41/00 (2006.01) C07J 5/00 (2006.01) C07J 21/00 (2006.01) C07J 33/00 (2006.01)

Patent

CA 2113404

L'invention concerne les composés (I): Image R = oxo ou .beta.-OH et A et B représentent un reste 3-céto .DELTA.4 ou .DELTA.1,4 libre ou protégé, leur préparation, leur application à la préparation des composés (A): Image R3 est un groupement protecteur du radical hydroxy, ainsi que des intermédiaires.

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