EP 1098881 A1 20010516 - 3-SUBSTITUTED PYRIDINE COMPOUNDS AND RELATED SYNTHESIS
Title (en)
3-SUBSTITUTED PYRIDINE COMPOUNDS AND RELATED SYNTHESIS
Title (de)
3-SUBSTITUIERTE PYRIDIN-VERBINDUNGEN UND VERWANDTE HERSTELLUNGSVERFAHREN
Title (fr)
COMPOS S DE PYRIDINE 3-SUBSTITU S ET SYNTH SE APPARENT E
Publication
Application
Priority
- EP 9905130 W 19990719
- US 12029198 A 19980721
Abstract (en)
[origin: WO0005212A1] The present invention relates to 3-substituted and 2,3-disubstituted pyridine compounds of formula (I), wherein R1 is C1-C4 haloalkyl and R4 is H, halogen or C1-C4 alkylthio; and acid addition salts thereof which are useful as intermediates in the synthesis of pyridylsulfonylurea herbicides. The invention also relates to arylation of alcohols using a pyridinediazonium salt. More particularly the arylation process of the instant invention relates to the synthesis of 2,3-disubstituted pyridine compounds via anhydrous diazotization of 3-aminopyridines to form a diazonium salt intermediate that is then reacted with the appropriate alcohol to produce the desired product. The invention additionally relates to pyridine-3-diazonium salt intermediates.
IPC 1-7
IPC 8 full level
C07D 213/65 (2006.01); C07D 213/76 (2006.01); C07D 213/77 (2006.01)
CPC (source: EP)
C07D 213/65 (2013.01); C07D 213/77 (2013.01)
Citation (search report)
See references of WO 0005212A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0005212 A1 20000203; AU 5411799 A 20000214; EP 1098881 A1 20010516; IL 140750 A0 20020210; IL 140750 A 20060820; IL 172228 A 20060410; JP 2002521366 A 20020716; ZA 200100474 B 20020516
DOCDB simple family (application)
EP 9905130 W 19990719; AU 5411799 A 19990719; EP 99940022 A 19990719; IL 14075001 A 20010104; IL 14075099 A 19990719; IL 17222805 A 20051128; JP 2000561168 A 19990719; ZA 200100474 A 20010117