High purity 1,3-dialkyl-2-imidazolidinone and preparation proces

Details High purity 1,3-dialkyl-2-imidazolidinone and preparation proces High purity 1,3-dialkyl-2-imidazolidinone and preparation proces

1997-07-21

1999-02-16

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23332

Patent

active

058722602

ABSTRACT:
In a process for reacting N,N'-dialkylethylenediamine with urea in an aprotic polar solvent to prepare 1,3-dialkyl-2-imidazolidinone, a process comprising progressing the reaction while continuously adding N,N'-dialkylethylnediamine and urea into the aprotic polar solvent. The process is a high-yield manufacturing process in industry capable of efficiently producing very high purity 1,3-dialkyl-2-imidazolidinone which contains less than 0.1% by weight of by-product 1,3-dialkyl-2-imidazolidinimine derived from the raw materials.

REFERENCES:
patent: 4731453 (1988-03-01), Nagata et al.
patent: 4897480 (1990-01-01), Schoenleben
patent: 5011936 (1991-04-01), Kobayashi et al.
patent: 5594149 (1997-01-01), Nause et al.

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