Novel steroids

Details Novel steroids Novel steroids

1987-12-07

1989-07-11

Sneed, H. M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

540110, C07S 900, C07D22102

Patent

active

048470147

ABSTRACT:
A compound of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, R.sub.2 is methyl or ethyl, the A,B,C and D rings optionally have one or more double bonds and are optionally substituted with one or more members of the group consisting of halogen protected hydroxy, 1/8O, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms, R is selected from the group consisting of halogen, --OH, alkoxy of 1 to 6 carbon atoms, aralkoxy of 7 to 15 carbon atoms, alkylthio of 1 to 6 carbon atoms, arylthio of 6 to 14 carbon atoms, aralkylthio of 7 to 15 carbon atoms and ##STR2## wherein R.sub.3 and R.sub.4 are individually selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms and aralkyl of 7 to 15 carbon atoms or R.sub.3 and R.sub.4 together with the nitrogen atom form another heterocycle optionally containing a nitrogen atom or oxygen atom and their preparation and their use to form 20-keto-pregnanes.

REFERENCES:
patent: 3906095 (1975-09-01), Laurent et al.
Synthesis of 23,23-Difluoro-25-Hydroxyvitamin D3, Taguchi et al., Tet. Lett. (1984), 4933-4936.

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