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Cyanoethylation of hydantoins |
| T973016 |
Cyanoethylation of hydantoins
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| Inventor: |
Shull, et al. |
| Date Issued: |
August 1, 1978 |
| Application: |
05/846,019 |
| Filed: |
October 27, 1977 |
| Inventors: |
Freilich; John Douglas (Grand Island, NY)
Shull; Samuel Ellsworth (Cogan Station, PA)
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| Assignee: |
Glyco Chemicals, Inc. (Greenwich, CT) |
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| U.S. Class: |
548/320.1 |
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| Abstract: |
an improved process for the manufacture of a 3-.beta.-cyanoethyl- or a 1,3-di(.beta.-cyanoethyl)-5,5-disubstituted hydantoin, by reacting acrylonitrile and a 5,5-disubstituted hydantoin in the presence of a base catalyst in a solvent media composed of a secondary and/or tertiary alcohol having up to 5 carbon atoms and a boiling point from between about 80.degree.-135.degree. C as a reaction solvent. The alcohol reaction solvent may be used for crystallization of the cyanoethylated product.The solvent media can for example be selected from the group of isopropanol, 2-methyl-2-butanol, 3-methyl-2-butanol, 2-pentanol, 3-pentanol, tertiary butanol, 1,1-dimethylpropanol and mixtures thereof. The process provides for obtaining high yields of pure product with the formation of a minimum of side reactions and by-products. |
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