作者:Daniel B. Moran、George O. Morton、J. Donald Albright
DOI:10.1002/jhet.5570230422
日期:1986.7
4-triazolo[4,3-a]pyridines were developed. The principal route to the required intermediate 2-chloropyridines was based on rearrangements of mono N-oxides of 2,2′-bipyridine, 2,3′-bipyridine, 3,3′-bipyridine, 2,4′-bipyridine and 4,4′-bipyridine with phosphorus oxychloride. Reaction of 3,3′-bipyridine 1-oxide or 2,2′-bipyridine 1-oxide with phosphorus oxychloride gave mixtures of chloro isomers. Reaction with acetic
开发了合成(吡啶基)-1,2,4-三唑并[4,3- a ]吡啶的方法。到所需的中间体2-氯吡啶的主要途径是基于单重排Ñ -oxides 2,2'-联吡啶,2,3'-联吡啶,3,3'-联吡啶,2,4'-联吡啶和4, 4'-联吡啶与三氯氧化磷。3,3′-联吡啶1-氧化物或2,2′-联吡啶1-氧化物与三氯氧化磷反应,得到氯代异构体的混合物。与乙酸酐,3,3'-联吡啶1-氧化物和2,2'-联吡啶1-氧化物反应,仅得到[3,3'-联吡啶] -2(1 H)-one和[2,2'-联吡啶] -6(1 H)-一。