20-Isocyano-.DELTA..sup.17(20) -steroids

Details 20-Isocyano-.DELTA..sup.17(20) -steroids 20-Isocyano-.DELTA..sup.17(20) -steroids

1981-07-07

1985-02-26

Roberts, Elbert L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603975, 260940, 260944, C07J 100

Patent

active

045017018

ABSTRACT:
Novel 20-isocyano-.DELTA..sup.17(20) -steroids of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of (1) hydrogen, (2) alkyl of 1 to 4 carbon atoms optionally substituted with a member of the group consisting of halogen, an oxygen function and a nitrogen function and (3) alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms, Alk.sub.1, is alkyl of 1 to 8 carbon atoms and the A,B,C, and D rings may contain one or more double bonds and may be optionally substituted with at least one member of the group consisting of --OH, .dbd.0, halogens, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms and a process for their preparation and their use to prepare 17.alpha.-ol-20-keto steroids.

REFERENCES:
patent: 4251450 (1981-02-01), Krbechek

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