Polycyclic dihydroxy compounds and methods for preparation
View Patent ↗A dihydroxy aromatic compound having a Formula (I) wherein R 1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; R 2 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; and each R 3 and R 4 , at each occurrence, can be the same or different and are independently at each occurrence an aliphatic functionality having 1 to 10 carbons or a cycloaliphatic functionality having 3 to 10 carbons, “n” is an integer having a value 0 to 4 and “m” is an integer having a value 0 to 4.
1. A dihydroxy aromatic compound having a Formula (I),
wherein R 1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; R 2 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; and each R 3 and R 4 , at each occurrence, can be the same or different and are independently at each occurrence an aliphatic functionality having 1 to 10 carbons or a cycloaliphatic functionality having 3 to 10 carbons; “n” is an integer having a value 0 to 4 and “m” is an integer having a value 0 to 4.
2. The dihydroxy aromatic compound of claim 1 having a Formula (II)
3. A process comprising;
reacting acetone with a compound of Formula (III) in the presence of a first catalyst to produce dibenzalacetone of Formula (IV)
reacting the dibenzalacetone of Formula (IV) in the presence of a second catalyst with a compound of Formula (V) to produce a compound of Formula (VI)
reacting the compound of Formula (VI) with a compound of Formula (VII) in the presence of an acid catalyst and a promoter to produce a compound of Formula (I),
wherein R 1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; R 2 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; and each R 3 and R 4 , at each occurrence, can be the same or different and are independently at each occurrence an aliphatic functionality having 1 to 10 carbons or a cycloaliphatic functionality having 3 to 10 carbons; “n” is an integer having a value 0 to 4 and “m” is an integer having a value 0 to 4.
4. The process of claim 3 wherein the compound of Formula (III) comprises benzaldehyde.
5. The process of claim 3 wherein the compound of Formula (V) comprises dimethyl malonate.
6. The process of claim 3 wherein the compound of Formula (VII) comprises phenol.
7. The process of claim 3 wherein the promoter comprises resorcinol or 3-mercaptopropionic acid.
8. The process of claim 3 wherein the acid catalyst comprises hydrogen chloride gas.
9. The process of claim 3 wherein the first catalyst comprises alkali metal hydroxide, dry hydrogen chloride or glacial acetic acid with sulfuric acid.
10. The process of claim 9 wherein the first catalyst comprises sodium hydroxide.
11. The process of claim 3 wherein the second catalyst comprises alkoxide, ammonium ylides, 1,4-diazabicyclo[2.2.2] octane, rhodium acetate, sodium carbonate or benzyltriethylammonium hydroxide.
12. The process of claim 3 , wherein the reaction of acetone with a compound of Formula (III) occurs at a temperature of about 20° C. to about 40° C.
13. The process of claim 3 , wherein the reaction of the dibenzalacetone of Formula (IV) with the compound of Formula (V) occurs at a temperature of about 40° C. to about 80° C.
14. The process of claim 3 , wherein the reaction of the compound of Formula (VI) with the compound of Formula (VII) occurs at a temperature of about 40° C. to about 80° C.
15. A process comprising;
reacting acetone with benzaldehyde having Formula (VIII) in presence of sodium hydroxide to produce dibenzalacetone having Formula (IX)
reacting the dibenzalacetone having Formula (IX) in presence of sodium methoxide with dimethyl malonate having Formula (X) to produce methyl-2,6-diphenyl-cyclohexane-4-one-1,1-dicarboxylate having Formula (XI)
reacting methyl-2,6-diphenyl-cyclohexane-4-one-1,1-dicarboxylate with phenol having Formula (XII) in presence of an acid catalyst and a promoter to produce methyl-4,4′-bis(4-hydroxy-phenyl)-2,6-diphenyl-cyclohexane-1,1-dicarboxylate having Formula (II),