Benzonaphthalene derivatives and their use in therapeutic and cosmetic compositions

Abstract

A benzonaphthalene compound has the formula ##STR1## wherein R 1 represents ##STR2## or (ii) --CH 2 OH; R 6 represents ##STR3## or OR 7 wherein R 7 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, r' or r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl, aryl or a residue of an amino acid or a sugar, or together form a heterocycle; R 2 represents hydrogen, alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radical; R 3 represents hydrogen, hydroxy, alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical, a thiocycloaliphatic radical or --O--Si(CH 3 ) 2 --R 8 wherein R 8 represents lower alkyl; and R 4 and R 5 represent hydrogen, lower alkyl, hydroxy or lower acyloxy. This compound is useful in the topical and systemic treatment of dermatologic diseases and in the treatment of the degeneration of conjunctive tissues. The compound also possesses anti-tumor acitivity.

What is claimed is: 
     
       1. A benzonaphthalene compound of the formula ##STR11## wherein R 1  represents (i) ##STR12##  or (ii) --CH 2  OH, R 6  represents ##STR13##  wherein r' and r" represent hydrogen, lower alkyl, mono or polyhydroxyalkyl, aryl or a residue of an amino sugar selected from the group consisting of glucosamine, galactosamine and mannosamine, R 2  represents hydrogen, branched or straight chain alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or a cycloaliphatic radical,   R 3  represents hydrogen, hydroxy, branched or straight chain alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, a cycloaliphatic radical selected from the group consisting of 1-methyl cyclohexyl and 1-adamantyl, a thiocycloaliphatic radical, or --O--Si(CH 3 ) 2  --R 8  wherein R 8  represents linear or branched lower alkyl, and   R 4  and R 5  each independently represent hydrogen, lower alkyl, hydroxy or lower acyloxy,   or a salt thereof.   
     
     
       2. The compound of claim 1 having the formula ##STR14## wherein R' 6  represents ##STR15## r' and r" each independently represent hydrogen or lower alkyl having 1-6 carbon atoms, R' 2  represents hydrogen, alkyl having 1-15 carbon atoms, alkoxy having 1-4 carbon atoms or 1-adamantyl, and   R' 3  represents hydrogen, hydroxy, alkoxy having 1-10 carbon atoms, alkyl having 1-4 carbon atoms or 1-adamantyl thio.   
     
     
       3. The compound of claim 1 selected from the group consisting of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthalene methanol and   the ethylamide of 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid.   
     
     
       4. The compound of claim 1 wherein said alkyl is selected from the group consisting of methyl, ethyl, isopropyl, butyl and tert.butyl. 
     
     
       5. The compound of claim 1 wherein said alkoxy is selected from the group consisting of methoxy, ethoxy, isopropoxy, hexyloxy and decyloxy. 
     
     
       6. The compound of claim 1 wherein said lower acyloxy has 1-4 carbon atoms. 
     
     
       7. The compound of claim 6 wherein said lower acyloxy is selected from the group consisting of acetyloxy and propionyloxy. 
     
     
       8. The compound of claim 1 wherein said monohydroxyalkyl has 2 or 3 carbon atoms. 
     
     
       9. The compound of claim 8 wherein said monohydroxyalkyl is selected from the group consisting of 2-hydroxyethyl and 2-hydroxypropyl. 
     
     
       10. The compound of claim 1 wherein said polyhydroxyalkyl has 3-6 carbon atoms and 2-5 hydroxy groups. 
     
     
       11. The compound of claim 10 wherein said polyhydroxyalkyl is selected from the group consisting of 2,3-dihydroxypropyl, 1,3-dihydroxypropyl or a residue of pentaerythritol.   
     
     
       12. The compound of claim 1 wherein said thiocycloaliphatic radical is 1-adamantylthio. 
     
     
       13. A benzonaphthalene compound of the formula ##STR16## wherein R 1  represents ##STR17##  wherein R 7  represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl or polyhydroxyalkyl, R 2  represents hydrogen, branched or straight chain alkyl having 1-15 carbon atoms or alkoxy having 1-4 carbon atoms,   R 3  represents hydrogen, hydroxy, branched or straight chain alkyl having 1-4 carbon atoms, alkoxy having 1-10 carbon atoms, or --O--Si(CH 3 ) 2  --R 8  wherein R 8  represents linear or branched alkyl,   R 4  and R 5  each independently represent hydrogen, lower alkyl.Iadd., hydroxy .Iaddend.or lower acyloxy, or a salt thereof.   
     
     
       14. The compound of claim 13 selected from the group consisting of 6-(3-methylphenyl)-2-naphthoic acid,   the methyl ester of 6-(3-methylphenyl)-2-naphthoic acid,   6-(4-tert.butyl phenyl)-2-naphthoic acid,   the methyl ester of 6-(4-tert.butyl phenyl)-2-naphthoic acid,   6-(3-tert.butyl phenyl)-2-naphthoic acid,   the methyl ester of 6-(3-tert.butyl phenyl)-2-naphthoic acid,   6-(3,4-dimethoxy phenyl)-2-naphthoic acid,   the methyl ester of 6-(3,4-dimethoxy phenyl)-2-naphthoic acid,   the methyl ester of 6-(3-tert.butyl-4-methoxyphenyl)-2-naphthoic acid,   6-(3-tert.butyl-4-methoxy phenyl)-2-naphthoic acid,   the methyl ester of 6-[3-(1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid and   6-[3-(1,1-dimethyldecyl)-4-methoxyphenyl]-2-naphthoic acid.   
     
     
       15. A pharmaceutical composition comprising a pharmaceutically acceptable vehicle suitable for enteral, parenteral, topical or ocular administration and an effective amount of as the active principle at least one compound of claim 1 or a salt thereof. 
     
     
       16. The pharmaceutical composition of claim 15 wherein said active principle is present in an amount ranging from 0.0005 to about 5 weight percent based on the total weight of said composition. 
     
     
       17. The pharmaceutical composition comprising a pharmaceutically acceptable vehicle suitable for enteral, parenteral, topical or ocular administration and an effective amount of, as the active principle, at least one compound of claim 13 or a salt thereof. 
     
     
       18. The pharmaceutical composition of claim 17 wherein said active principle is present in an amount ranging from 0.0005 to about 5 weight percent based on the total weight of said composition.