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US 4,357,279 AGranted
Preparation of corticoids from 17-keto steroids
AssigneeThe Upjohn Company
InventorsJerry A. Walker, Edward J. Hessler
Life of this patent
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Abstract
A process for the preparation of corticoids (XI) which comprises reacting a protected 17-keto steroid (II) with a metallated 1,2-dihaloethene (III).
Claims11
A protected C.sub.21 steroid selected from the group consisting of
- where A, M, R.sub.3, R.sub.3 ', R.sub.3 ", R.sub.6, R.sub.9, R.sub.11,
A 3-keto-C.sub.21 steroid of the formula ##STR3## where A, M, R.sub.6, R.sub.9, R.sub.11, R.sub.16, .about. and are defined in the specification.
Dependencies are inferred from the claim text.