Processes for preparing alkylated indanes and tetrahydronaphthal

Details Processes for preparing alkylated indanes and tetrahydronaphthal Processes for preparing alkylated indanes and tetrahydronaphthal

1990-12-03

1992-02-11

Shine, W. J.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

585446, 585462, 585477, C07C 270, C07C 264, C07C 522

Patent

active

050877852

ABSTRACT:
Improved processes for the production of secondary alkyl indanes, particularly mixtures of 1,1,3,5-tetramethyl-3-isopropylindanes and 1,3,3,5-tetramethyl-3-isopropylindane, and alkylated tetrahydronaphthalenes, particularly mixtures of 1,1,3,4,4,6-hexametyl-1,2,3,4-tetrahydronaphthalene and 1,1,2,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene, are described. In the processes of the invention, alkylated tetrahydronaphthalenes or secondary alkyl indanes are isomerized in the presence of a Lewis acid and a solvent which may be a halogenated or unhalogenated solvent and, optionally, a phase transfer agent, to produce, in the case of an alkylated tetrahydronaphthalene starting material, a secondary alkyl indane, and in the case of a secondary alkyl indane starting material, an aklylated tetrahydronaphthalene. The Lewis acid is present in the reaction medium in an amount of less than about 50 mole percent based on the amount of the alkylated tetrahydronaphthalene or secondary alkylindane charged. The subject processes produce the desired compounds at a high rate of reaction, using better, safer, more convenient, or less expensive process methodology than many processes known heretofore.

REFERENCES:
patent: 3336407 (1967-08-01), Bushick
patent: 4376224 (1983-03-01), Gormley
patent: 4466908 (1984-08-01), Sprecker et al.
Kirk-Othmer, Encycl. of Chem. Tech,., 3rd ed., U.S., pp. 62-67.

Affiliated with

Also associated with

Rating

Processes for preparing alkylated indanes and tetrahydronaphthal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for preparing alkylated indanes and tetrahydronaphthal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for preparing alkylated indanes and tetrahydronaphthal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-783041