Global Patent Index - EP 1098881 A1

EP 1098881 A1 2001-05-16 - 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

EP 1098881 A1 (EN)

Application

EP 99940022 A

Priority

  • EP 9905130 W
  • US 12029198 A

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 (main, further and additional classification)

C07D 213/65; C07B 41/04; C07D 213/77; C07D 401/12

IPC 8 full level (invention and additional information)

C07D 213/65 (2006.01); C07D 213/76 (2006.01); C07D 213/77 (2006.01)

CPC (invention and additional information)

C07D 213/77 (2013.01); C07D 213/65 (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

EPO simple patent family

WO 0005212 A1 20000203; AU 5411799 A 20000214; EP 1098881 A1 20010516; IL 140750 A 20060820; IL 140750 D0 20020210; IL 172228 A 20060410; JP 2002521366 A 20020716; ZA 200100474 B 20020516

INPADOC legal status


2008-06-18 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20071221

2003-09-24 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030808

2001-05-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010127

2001-05-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-05-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI