Process for preparing isocyanic acid derivatives
US4059610A · kind A · utility
7Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1976 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | May 14, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C263/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Isocyanic acid derivatives are prepared by reacting an organic halogen compound with an alkali cyanate in N,N-disubstituted organic acid amides, N,N-disubstituted sulfonic acid amides, sulfoxides, sulfones or macrocyclic polyethers, at 70.degree. to 200.degree. C, in the presence of organic polyhalogen compounds selected from compounds having dihalogenomethyl group, dihalogenomethylene group, or trihalogenomethyl group and tetrahalogenomethane, in an amount in the range of from 1 to 20 weight percent based on the weight of said organic halogen compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.