Processes for preparation of 2-alkyl-2-adamantyl esters

Details Processes for preparation of 2-alkyl-2-adamantyl esters Processes for preparation of 2-alkyl-2-adamantyl esters

2006-07-04

2006-07-04

Killos, Paul J. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

07071352

ABSTRACT:
A magnesium halide salt of a 2-alkyl-2-adamantanol is reacted with a carboxylic acid halide such as acrylic chloride or the like in the presence of a tertiary amine to produce a 2-alkyl-2-adamantyl ester (the first invention).A 2-alkyl-2-adamantanol is reacted with a carboxylic acid such as acrylic acid or the like in the presence of an acid catalyst such as concentrated sulfuric acid or the like and a drying agent composed of an acidic or neutral inorganic compound (e.g. magnesium sulfate) which is a solid at ordinary temperature in a dried state or of a water-absorbing high-molecular compound, to produce a 2-alkyl-2-admantyl ester (the second invention).The above ester is important as a raw material for a resist for semiconductor production.

REFERENCES:
patent: 5-43511 (1993-02-01), None
patent: 6-122652 (1994-05-01), None
patent: 10-182552 (1998-07-01), None
patent: 2000-229911 (2000-08-01), None
patent: 2000-309558 (2000-11-01), None
Patent Abstracts of Japan, JP 10-182552, Jul. 7, 1998.
Patent Abstracts of Japan, JP 06-122652, May 6, 1994.
Patent Abstracts of Japan, JP 05-043511, Feb. 23, 1993.
Patent Abstracts of Japan, JP 2000-229911, Aug. 22, 2000.
Patent Abstracts of Japan, JP 2000-309558, Nov. 7, 2000.

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