Diazonium salts which are intermediates for 3-substituted pyridines
申请人:Syngenta Participations AG
公开号:US06710180B2
公开(公告)日:2004-03-23
The present invention relates to 3-substituted and 2,3-disubstituted pyridine compounds 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-amninopyridines 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.
3-SUBSTITUTED PYRIDINE COMPOUNDS AND RELATED SYNTHESIS
申请人:Syngenta Participations AG
公开号:EP1098881A1
公开(公告)日:2001-05-16
US6509471B2
申请人:——
公开号:US6509471B2
公开(公告)日:2003-01-21
US6710180B2
申请人:——
公开号:US6710180B2
公开(公告)日:2004-03-23
[EN] 3-SUBSTITUTED PYRIDINE COMPOUNDS AND RELATED SYNTHESIS<br/>[FR] COMPOSÉS DE PYRIDINE 3-SUBSTITUÉS ET SYNTHÈSE APPARENTÉE
申请人:NOVARTIS AG
公开号:WO2000005212A1
公开(公告)日:2000-02-03
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.