Compounds having the formula

##STR00001##

or solvates of the compounds can be used as intermediates in the preparation of the synthetic steroids, Etonogestrel and Desogestrel, as well as other pharmaceutically active agents.

Described herein are neuroactive steroids of the Formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof; wherein R.sup.1, R.sup.2, R.sup.a, G, X, Y, Z, and n are as defined herein. Such compounds are envisioned, in certain embodiments, to behave as GABA modulators. Also provided are pharmaceutical compositions comprising a compound described herein and methods of use and treatment, e.g., such for inducing sedation and/or anesthesia.

Described herein are neuroactive steroids of the Formula (I): ##STR00001##
or a pharmaceutically acceptable salt thereof; wherein R.sup.1a and R.sup.1b are as defined herein. Such compounds are envisioned, in certain embodiments, to behave as GABA modulators. The present invention also provides pharmaceutical compositions comprising a compound of the present invention and methods of use and treatment, e.g., such for inducing sedation and/or anesthesia.

The present invention relates to compounds which are intermediates in the synthesis of bile acid derivatives with pharmacological activity. The invention relates to compounds of general formula (I):

##STR00001##

wherein: , R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and Y are as defined herein.

The compounds are intermediates in the synthesis of synthetic bile acids which are useful in the treatment of conditions such as liver disease. In addition, the invention relates to a method of synthesizing these intermediates and a method of preparing obeticholic acid and obeticholic acid analogues from the compounds of the invention.

A process for the preparation of 11-methylene steroids from di-keto steroids involves selective olefination of the ketone at position 11 of the di-keto steroids. The resulting 11-methylene steroid products can be used as intermediates in the preparation of the synthetic steroids, Etonogestrel and Desogestrel, as well as other pharmaceutically active agents.

Described herein are steroids of Formula (I):

##STR00001##

and pharmaceutically acceptable salts thereof; wherein R.sup.1, R.sup.2a, R.sup.2b, R.sup.3, R.sup.4, R.sup.5a, R.sup.5b, R.sup.6 and Z are as defined herein. Such compounds are contemplated useful for the prevention and treatment of a variety of CNS-related conditions, for example, treatment of sleep disorders, mood disorders, schizophrenia spectrum disorders, convulsive disorders, disorders of memory and/or cognition, movement disorders, personality disorders, autism spectrum disorders, pain, traumatic brain injury, vascular diseases, substance abuse disorders and/or withdrawal syndromes, and tinnitus.

The present invention relates to compounds which are intermediates in the synthesis of bile acid derivatives with pharmacological activity. The invention relates to compounds of general formula (I): ##STR00001##
wherein:
, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and Y are as defined herein. The compounds are intermediates in the synthesis of synthetic bile acids which are useful in the treatment of conditions such as liver disease. In addition, the invention relates to a method of synthesizing these intermediates and a method of preparing obeticholic acid and obeticholic acid analogues from the compounds of the invention.

Provided herein are compounds of Formula (I-I): and pharmaceutically acceptable alts thereof; wherein p, R.sup.1, R.sup.3a, R.sup.2a, R.sup.11a, R.sup.11b, R.sup.6a, and R.sup.6b are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I-X) and methods of using the compounds, e.g., in the treatment of CNS-related disorders.

##STR00001##

Disclosed are compounds that accumulate in Gram-negative bacteria. Also disclosed are method of antimicrobial treatment using the compounds.

Described herein are neuroactive steroids of the Formula (I): or a pharmaceutically acceptable salt thereof; wherein -------, R.sup.1, R.sup.2, R.sup.5, A and L are as defined herein. Such compounds are envisioned, in certain embodiments, to behave as GABA modulators. The present invention also provides pharmaceutical compositions comprising a compound of the present invention and methods of use and treatment, e.g., such for inducing sedation and/or anesthesia.

##STR00001##