EP 1019381 A1 20000719 - METHOD OF PRODUCING N,N'-DIAZOLE COMPOUNDS
Title (en)
METHOD OF PRODUCING N,N'-DIAZOLE COMPOUNDS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON N,N'-DIAZOLVERBINDUNGEN
Title (fr)
PROCEDE D'ELABORATION DE COMPOSES N, N'-DIAZOLE
Publication
Application
Priority
- US 9800592 W 19980109
- US 78562697 A 19970117
Abstract (en)
[origin: WO9831672A1] Describes a method of producing N,N'-diazole compounds, e.g. N,N'-carbonyldiimidazole, by reacting in an inert solvent, e.g., toluene, a 1-unsubstituted 1H-azole compound, e.g., 1H-imidazole, and a dihalide compound, e.g., phosgene, in the presence of an organic base, e.g., a tertiary amine such as tri(n-butyl)amine. The molar ratio of the 1-unsubstituted 1H-azole compound to the dihalide compound may range from 1.7:1 to 2.3:1. The organic base: 1-unsubstituted 1H-azole compound molar ratio is 1:1 when the molar ratio of the 1-unsubstituted 1H-azole compound to the dihalide compound is less than 2:1. The organic base has a basicity greater than that of the 1-unsubstituted 1H-azole compound, and along with its hydrohalide salt is soluble in the inert solvent.
IPC 1-7
IPC 8 full level
C07D 233/61 (2006.01); C07D 521/00 (2006.01)
CPC (source: EP)
C07D 231/12 (2013.01); C07D 233/56 (2013.01); C07D 249/08 (2013.01)
Citation (search report)
See references of WO 9831672A1
Designated contracting state (EPC)
BE CH DE DK ES FR GB IE IT LI NL
DOCDB simple family (publication)
WO 9831672 A1 19980723; CA 2278179 A1 19980723; CN 1109021 C 20030521; CN 1248247 A 20000322; EP 1019381 A1 20000719
DOCDB simple family (application)
US 9800592 W 19980109; CA 2278179 A 19980109; CN 98802686 A 19980109; EP 98901791 A 19980109