Merck + Co., Inc.

Josephine R Carlin

Shuet-Hing Lee Chiu

Richard L Tolman

Donald W Graham

Byron H Arison

Gary H Rasmusson

Edamanal S Venkataramani

Rae Taub

W J VandenHeuvel

7-substituted 4-aza cholanic acid derivatives and their use

Compounds of the Formula I ##STR1## wherein: the dotted line indicates that a double bond may be present or absent; R.sup.1 is H, methyl or ethyl; R.sup.2 is .alpha.- or .beta.-C.sub.1-10 straight or branched alkyl; R.sup.3 is CO.sub.2 H, CN, CO.sub.2 R.sup.4, COHNR.sup.4, or CON(R.sup.4).sub.2 ; R.sup.4 is H, C.sub.1-10 straight or branched alkyl, aryl, heteroaryl, or aralkyl; Aryl is phenyl, substituted phenyl, naphthyl, or biphenyl; Heteroaryl is pyridyl, pyrrolyl, thienyl, furanyl or quinolinyl; and Aralkyl is C.sub.1-10 alkyl substituted with one to three phenyl or substituted phenyl moieties; and their pharmaceutically acceptable salts are described. These compounds are 5.alpha.-reductase type 1 inhibitors. They may be used for treating conditions associated with an excess of DHT, either alone or in combination with other 5.alpha.-reductase inhibitors.

The present invention is concerned with a novel biotransformation process for producing 17.beta.-N-monosubstituted carbamoyl-11-oxo-4-aza-5-.alpha.-androst-3-ones of the formula: ##STR1## These compounds are testosterone 5-.alpha. reductase inhibitors and are produced via a claimed novel biotransformation process using the green algae, Selenastrum capricornutum.

Biological process for producing 17.beta.-N-monosubstituted

There are disclosed novel ivermectin compounds and a process for preparing them, the novel ivermectin compounds containing straight chain or branched fatty acid residues of from about C.sub.2 to about C.sub.20 and having the formula: ##STR1##

Ivermectin derivative compounds and process for preparing the same

The compounds of formula (I) ##STR1## wherein R is selected from hydrogen, methyl or ethyl, and R.sup.1 is C.sub.1-12 straight or branched chain alkyl wherein one of the hydrogens is substituted by hydroxy, carboxylic acid or C.sub.1-4 alkyl ester, and A is --CH.sub.2 --CH.sub.2 or --CH.dbd.CH--, and pharmaceutical formulations of the above compounds are active as testosterone 5.alpha.-reductase inhibitors and thus are useful for treatment of acne, seborrhea, female hirsutism or benign prostatic hypertrophy.

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North Brunswick, NJ, United States of America

Josephine R Carlin