DK136218C

• Main Authors: AYRES B E, PHILLIPPS G H, NEWALL C E
• Format: Patent
• Language: English
• Published: 06.02.1978
• Subjects: CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; STEROIDS

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 steriods 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.