Process for preparing arylsulphonyl-isocyanates and addition derivatives thereof
US5068424A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 14, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Jun 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C311/65
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing arylsulphonyl isocyanates of the general formula (I) ##STR1## and addition derivatives thereof--where in the formula the meaning of the substituents are as follows: PA1 Ar represents optionally substituted aryl, naphthyl- or thienyl group, and PA1 HX is a chemical bond or X PA1 ZR.sub.1 stands for a group where Z is oxygen or sulphur, PA1 R.sub.1 is saturated or unsaturated alkyl, benzyl, cyclohexyl or substituted phenyl group or PA1 X is an NR.sub.2 R.sub.3 group wherein R.sub.2 R.sub.3 is hydrogen, alkyl, unsubstituted alkyl, aryl, substituted aryl, aroyl or acyl group, and the essence of the process is that an N-halogen sulphonamidate is carbonylated in the presence of a carbonylating catalyst, in the presence or absence of alcohol, (thio) alcohol or amine reactants and the carbonylated compound obtained is reacted subsequently with the reactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.