[EN] A PROCESS FOR THE PREPARATION OF SUBSTITUTED PYRIDINE COMPOUNDS AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS PYRIDINE SUBSTITUÉS ET DE LEURS INTERMÉDIAIRES
申请人:PI INDUSTRIES LTD
公开号:WO2022053994A1
公开(公告)日:2022-03-17
The present invention discloses a process for the preparation of substituted pyridine compounds of formula (I), comprises a step in which vinylogous nitriles of formula (II), are obtained from substituted α,β-unsaturated nitrile compounds of formula (III), and a further step of converting the vinylogous nitrile compounds of formula (II) into substituted pyridines of formula (I); wherein R1, R2, R3, R4 and LG are as defined in the description.
本发明揭示了一种制备式(I)的取代吡啶化合物的方法,包括以下步骤:从式(III)的取代α,β-不饱和腈化合物中获得式(II)的藤黄烷腈,以及将式(II)的藤黄烷腈化合物转化为式(I)的取代吡啶的进一步步骤;其中R1,R2,R3,R4和LG如描述中所定义。