Abstract:
The present invention relates to a dienic derivative of the androstane series having the formula
WHEREIN R is a member selected from the group consisting of hydrogen, alkyl having 1 to 4 carbon atoms and alkali metal, R'' and R'''' are members selected from the group consisting of 1) hydrogen and -COOM, respectively, where M is alkali metal, and 2) taken together, the divalent
group, R2 is a member selected from the group consisting of hydrogen and methyl, with the proviso when R is hydrogen or alkyl having 1 to 4 carbon atoms, R'' and R'''' together are the divalent
Abstract:
WHEREIN R" IS LOWER ALKYL AND R"'' IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENE AND SUBSTITUTED LOWER ALKYLENE; AND A IS SELECTED FROM THE GROUP CONSISTING OF TWO HYDROGENS AND A DOUBLE BOND THESE COMPOUNDS ARE USEFUL AS INTERMEDIATES IN THE TOTAL SYNTHESIS OF STEROIDS, PARTICULARLY THOSE HAVING SUBSTITUENTS ON THE 17 CARBON ATOM.
=C(-O-R")2 AND =C WHREIN R'' REPRESENTS AN ALKYL HAVING FROM 1 TO 4 CARBON ATOMS; X REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF
X AND THE 9,11-POSITION IS A
3-(X=),13-R''-GON-4-EN-17-ONE WHERE C-4 IS REPLACED BY
THE PRESENT INVENTON RELATES TO 3,5-DIKETALS OF 4,5SECO-GONANE-3,517-TRIONES OF THE FORMULA
Abstract:
Novel intermediates for the preparation of trienic steroids which intermediates have the formula
WHEREIN R is alkyl of one to four carbon atoms and X is selected from the group consisting of aliphatic of one to six carbon atoms optionally substituted and cycloalkyl of three to six carbon atoms and Y is selected from the group consisting of O and ethylenedioxy.
Abstract:
WHEREIN R is alkyl having 1 to 4 carbon atoms and R2 is defined above, with a thioalkanoic acid of the formula
WHEREIN R1 is a linear alkyl having 1 to 4 carbon atoms and R2 is hydrogen or methyl comprising the steps reacting a compound of the formula The present invention relates to a process for the preparation of steroidal spirolactones having the formula
Abstract:
A PROCESS FOR THE PRODUCTION OF 16A,17A-DIHYDROXY-19NOR-PROGESTERONE FROM A 3,5-IKETAL OF 4,5-SECO-ESTRANE3,5,17-TRIONE BY 17-CYANATION, 16-DEHYDRATION, METHYLATION, HYDROLYSIS OF THE KETALS, CYCLIZATION OF THE A RING AND HYDROXYLATION OF THE $16 BOND. THE INTERMEDIATES ARE ALSO PART OF THE DISCLOURE.