Production method of high purity organic compound

Details Production method of high purity organic compound Production method of high purity organic compound

2005-02-08

2005-02-08

Desai, Rita (Department: 1625)

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

Organic compounds

Amino nitrogen containing

C560S129000, C560S116000, C560S117000, C548S100000, C546S184000, C544S002000

Reexamination Certificate

active

06852885

ABSTRACT:
There is provided a method for obtaining a target organic compound such as an alkyladamantyl ester efficiently by purifying a crude organic compound which contains, as impurities, sublimable materials which start to sublime at temperatures lower than a boiling point of the target organic compound by use of such a simple method as distillation during its production process, without being adversely affected by adherence of the sublimable materials.The distillation is carried out in the presence of a compound having a boiling point which is lower than a boiling point of the target organic compound, e.g., a carbonyl-group-containing compound. For example, 2-methyl-2-adamantyl methacrylate (boiling point: 92° C./0.3 mmHg) containing sublimable impurities such as adamantane (sublimation starting temperature: room temperature or lower) is distilled in the presence of 1,3-dimethyl-2-imidazolidinone (boiling point: 225° C.).

REFERENCES:
patent: 5-265212 (1993-10-01), None
patent: 11-228459 (1999-08-01), None
patent: 2000-38362 (2000-02-01), None
patent: 2000038362 (2000-08-01), None

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