On the reaction of some 5-polyfluoroaryl-1,2,4-oxadiazoles with methylhydrazine: synthesis of fluorinated indazoles
作者:Antonio Palumbo Piccionello、Andrea Pace、Paola Pierro、Ivana Pibiri、Silvestre Buscemi、Nicolò Vivona
DOI:10.1016/j.tet.2008.10.094
日期:2009.1
The reaction of 5-polyfluoroaryl-1,2,4-oxadiazoles with methylhydrazine has been studied and the synthesis of fluorinated N-methylindazoles has been realized. Rearrangement reactions showed predominantly formation of N(1)-methylindazole regioisomers. Starting compounds were preliminarily functionalized at the polyfluoroaryl moiety through fluorine displacement with nucleophiles (methanol, methylamine
研究了5-聚氟芳基-1,2,4-恶二唑与甲基肼的反应,并实现了氟化N-甲基吲唑的合成。重排反应表明主要形成N(1)-甲基吲唑区域异构体。起始化合物通过亲核试剂(甲醇,甲胺,二甲胺)的氟置换在聚氟芳基部分进行了初步官能化,从而获得了在C(6)位置取代的目标吲唑。