Process for the preparation of pregnane derivatives

Details Process for the preparation of pregnane derivatives Process for the preparation of pregnane derivatives

C - Chemistry, Metallurgy

07

J

C07J 5/00 (2006.01) C07J 9/00 (2006.01) C07J 21/00 (2006.01) C07J 41/00 (2006.01) C07J 75/00 (2006.01)

Patent

CA 2416850

A process for the preparation of pregnane derivatives which comprises reacting a compound (I) with an alkali metal or an alkaline earth metal in the presence of ammonia or an amine to obtain a compound (II), protecting the hydroxyl groups of the compound (II) to obtain a compound (III), protecting the compound (III) at the 3-position to obtain a compound (IV), and subjecting the compound (IV) to solvolysis to obtain a compound (V); and compound (II).

L'invention concerne un procédé de préparation de dérivés de prégnane qui consiste à faire réagir un composé (I) comprenant un métal alcalin ou un métal terreux alcalin, en présence d'ammoniac ou d'une amine afin d'obtenir un composé (II), à protéger les groupes hydroxyle du composé (II) afin d'obtenir un composé (III), à protéger le composé (III) en position 3 afin d'obtenir un composé (IV) et à soumettre ce composé (IV) à une solvolyse afin d'obtenir un composé (V). L'invention concerne également le composé (II).

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