17.alpha.-Acyloxy-5.beta.-corticoids and 17.alpha.-acyloxy-5.alpha.-corticoids

Abstract

17.alpha.-Acyloxy-5.beta.-pregnanes (I) and 17.alpha.-acyloxy-5.alpha.-pregnanes (IV) have an excellent activity split providing high topical anti-inflammatory activity with very low systemic side effects.

Description

Claims

1. A 5.beta.-steroid of the formula ##STR1## where R.sub.2 is a hydrogen, fluorine or chlorine atom or methyl group;

R.sub.6 is a hydrogen, fluorine or chlorine atom or methyl group;

R.sub.7 is a hydrogen, fluorine or chlorine atom;

R.sub.9 is a hydrogen, fluorine or chlorine atom;

R.sub.11 is a chlorine or oxygen atom or hydroxyl group; when R1.sub.1 is a chlorine atom or hydroxyl group the between R.sub.11 and C.sub.11 is a single bond in the .beta. configuration and when R.sub.11 is an oxygen atom the between R.sub.11 and C.sub.11 is a double bond;

R.sub.16.alpha. is a hydrogen, fluorine or chlorine atom or methyl group;

R.sub.16.beta. is a hydrogen atom or methyl group with the proviso that one of R.sub.16.alpha. or R.sub.16.beta. is a hydrogen atom;

R.sub.17 is alkyl of 1 through 6 carbon atoms, phenyl, p-methylphenyl, p-carboxyphenyl or p-carboalkoxyphenyl;

R.sub.21 is a hydrogen, fluorine, chlorine or bromine atom or a --OR.sub.21.alpha. or --OSO.sub.2 CH.sub.3 group;

R.sub.21.alpha. is a hydrogen atom, --COR.sub.21.beta. or --PO(OH).sub.2 and pharmaceutically acceptable salts thereof;

R.sub.21.beta. is alkyl of 1 through 6 carbon atoms, phenyl, p-methylphenyl, or p-carboxyphenyl, p-carboalkoxyphenyl, --CH.sub.2 CH.sub.2 COOH and pharmaceutically acceptable salts thereof;

is a single or double bond; and

indicates the attached group can be in either the .alpha. or .beta. configuration.

2. A compound according to claim 1 where R.sub.2 is a hydrogen atom or methyl group.

3. A compound according to claim 2 where R.sub.2 is a hydrogen atom.

4. A compound according to claim 1 where R.sub.6 is a hydrogen or fluorine atom or methyl group.

5. A compound according to claim 4 where R.sub.6 is a hydrogen atom.

6. A compound according to claim 1 where R.sub.7 is a hydrogen or chlorine atom.

7. A compound according to claim 6 where R.sub.7 is a hydrogen atom.

8. A compound according to claim 1 where R.sub.16.alpha. is a hydrogen atom or methyl group.

9. A compound according to claim 1 where R.sub.16.beta. is a hydrogen atom or methyl group.

10. A compound according to claim 9 where R.sub.16.beta. is a methyl group.

11. A compound according to claim 1 where R.sub.17 is alkyl of 1 thru 5 carbon atoms, phenyl, or paramethylphenyl.

12. A compound according to claim 11 where R.sub.17 is alkyl of 1 thru 4 carbon atoms or phenyl.

13. A compound according to claim 1 where R.sub.21 is a hydrogen, fluorine, or chlorine atom or a --OR.sub.21.alpha. group where R.sub.21.alpha. is defined in the specification.

14. A compound according to claim 13 where R.sub.21 is a hydrogen or chlorine atom or --OR.sub.21.alpha. group where R.sub.21.alpha. is --COR.sub.21.beta. where R.sub.21.beta. is defined in the specification.

15. A compound according to claim 1 which is 21-chloro-9.alpha.-fluoro-11.beta.,17.alpha.-dihydroxy-16.beta.-methyl-5.beta.-pregnane-3,20-dione 17-propionate.