Phosphoric acid isomerization of a 5(10),9(11)-diene steroid...

Details Phosphoric acid isomerization of a 5(10),9(11)-diene steroid... Phosphoric acid isomerization of a 5(10),9(11)-diene steroid...

C - Chemistry, Metallurgy

07

J

C07J 1/00 (2006.01) C07J 75/00 (2006.01)

Patent

CA 2467741

The invention is a process for the preparation of a .DELTA.;4,9 -steroid of formula (II) which comprises contacting a .DELTA.;5(10),9(11) -steroid of formula (I) with a phosphorous containing acid.

L'invention concerne un procédé de préparation d'un stéroïde .DELTA.?4,9¿ de formule (II), laquelle comprend la mise en contact d'un stéroïde .DELTA.?5(10),9(11)¿ de formule (I) avec un acide contenant du phosphore.

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