Process for the preparation of 4-amino-3-ketosteroids via...

C - Chemistry – Metallurgy – 07 – J

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07J 41/00 (2006.01) A61K 31/56 (2006.01)

Patent

CA 2188760

The present invention provides 4-nitro-.DELTA.4-3- ketosteroids, their use as steroid C17-20 lyase and 5.alpha.-reductase inhibitors and to a novel process for preparing a compound of formula (I), comprising sequentially: a) reacting a starting compound of for- mula (II) with an effective amount of a strong base at an elevated or suitable temperature for a time suf- ficient to create the corresponding thermodynamic dienolate, followed by addition of a neutral nitrat- ing agent to produce the 4-nitro-steroid; and then, b) reacting the 4-nitrosteroid with a suitable reduc- ing agent.

L'invention concerne des 4-nitro- DELTA <4>-3-kétostéroïdes, leur utilisation comme inhibiteurs de stéroïde C17-20 lyases et de 5 alpha -réductases, ainsi qu'un nouveau procédé permettant de préparer un composé de formule (I), ce procédé consistant à faire réagir un composé de départ ayant la formule (II) avec une quantité efficace d'une base forte à une température élevée ou appropriée suffisamment longtemps pour produire le diénolate thermodynamique correspondant, puis à ajouter un agent de nitration neutre pour obtenir le 4-nitro-stéroïde; il consiste ensuite à faire réagir le 4-nitrostéroïde avec un agent réducteur approprié.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for the preparation of 4-amino-3-ketosteroids via... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of 4-amino-3-ketosteroids via..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 4-amino-3-ketosteroids via... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1553629

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.