Claims
- 1. A process for the preparation of a hydantoin comprising reacting at a temperature of from 0.degree. to 450.degree. C. an organic monoisocyanate or monoisothiocyanate of the formula R.sub.5 -NCO or R.sub.5 -NCS with an unsaturated diamide of the formula: ##STR12## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.6 may be the same or different and each is selected from the group consisting of hydrogen, alkyl of 1-20 carbon atoms, aryl of 6-20 carbon atoms and aralkyl of 7-20 carbon atoms; R.sub.3 and R.sub.4 are also bivalent and trivalent organic moieties corresponding to the previously mentioned monovalent organic moieties; when x and y are both one, R.sub.4 and R.sub.6 are additionally together forming a heterocyclic having 3-7 carbon atoms wherein a nitrogen heteroatom is bonded to both R.sub.4 and R.sub.6 ; R.sub.1 and R.sub.2 are also halogen; R.sub.5 is selected from the group consisting of unsubstituted or substituted alkyl of 1-20 carbon atoms, unsubstituted or substituted cycloalkyl of 5-12 carbon atoms, unsubstituted or substituted aryl of 6-12 carbon atoms, heterocyclic aryl of 4-12 carbon atoms wherein the hetero atom is N, O or S and heterocycloalkyl of 4-12 carbon atoms wherein the hetero atom is N, O or S, and the substituents are selected from the group consisting of halogen, alkyl of 1-6 carbon atoms and aryl of 6-16 carbon atoms; and
- x and y each are integers from 1 to 3, with the proviso that at least one of x and y is 1.
- 2. A process as claimed in claim 1, wherein x and y are integers of 1 or 2.
- 3. A process as claimed in claim 1, wherein the reaction temperature is from 50.degree. to 250.degree. C.
- 4. The hydantoin obtained by the process as claimed in claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2714655 |
Apr 1977 |
DEX |
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Parent Case Info
This application is a division of application Ser. No. 854,111 filed Nov. 23, 1977, now U.S. Pat. No. 4,182,812.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4089860 |
Merten et al. |
May 1978 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
854111 |
Nov 1977 |
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