Anaesthetic composition containing a steroid of the 5.alpha.-pregnane
申请人:Glaxo Laboratories Limited
公开号:US03952031A1
公开(公告)日:1976-04-20
This invention relates to steroids of the pregnane and 19-norpregnane series having anaesthetic properties and compositions containing them. More particularly the present invention relates to such steroids having a variety of substituents in the 2.beta.-position, a 3.alpha.-hydroxy group and a 5.alpha.-hydrogen atom and esters and 20-ketals thereof. At the 11-position of such steroids is preferably either two hydrogen atoms or an oxo group. The compounds according to the invention may conveniently be prepared by reaction of an appropriate 2.alpha.,3.alpha.-epoxy-pregnane or 19-norpregnane with a reagent which introduces the desired 2.beta.-substituent and various modifications of the compound produced are described to produce compounds within the scope of the invention. The present invention provides compositions containing certain steroids of the pregnane and 19-norpregnane series and such compositions generally may be administered intravenously to induce anaesthesia, the invention providing methods of inducing anaesthesia.
Neurosteroid analogues. 15. A comparative study of the anesthetic and GABAergic actions of alphaxalone, Δ16-alphaxalone and their corresponding 17-carbonitrile analogues
作者:Achintya K. Bandyopadhyaya、Brad D. Manion、Ann Benz、Amanda Taylor、Nigam P. Rath、Alex S. Evers、Charles F. Zorumski、Steven Mennerick、Douglas F. Covey
DOI:10.1016/j.bmcl.2010.09.008
日期:2010.11
Alphaxalone, a neuroactive steroid containing a 17 beta-acetyl group, has potent anesthetic activity in humans. This pharmacological activity is attributed to this steroid's enhancement of gamma-amino butyric acid-mediated chloride currents at gamma-amino butyric acid type A receptors. The conversion of alphaxalone into Delta(16)-alphaxalone produces an analogue that lacks anesthetic activity in humans and that has greatly diminished receptor actions. By contrast, the corresponding 17 beta-carbonitrile analogue of alphaxalone and the Delta(16)-17-carbonitrile analogue both have potent anesthetic and receptor actions. The differential effect of the Delta(16)-double bond on the actions of alphaxalone and the 17 beta-carbonitrile analogue is accounted for by a differential effect on the orientation of the 17-acetyl and 17-carbonitrile substituents. (C) 2010 Elsevier Ltd. All rights reserved.