A Convenient Synthetic Methodology for the Elaboration of the Pyrido[2,3-b]-or [3,4-b]-pyrazine and [1,4]diazepine Skeletons
作者:Axel Couture、Pierre Grandclaudon
DOI:10.1055/s-1991-26623
日期:——
The condensation of the anion of 3-(formylamino)-2-chloropyridines, 3-(acetylamino)-2-chloro-, -4-chloro- or -2,4-dichloropyridines with various chloro-N,N-dimethylalkylamines gives rise efficiently to 1,2,3, 4-tetrahydropyrido[2,3-b]- or [3,4-b]- pyrazines and to 2,3,4, 5-tetrahydro-1H-pyrido[2,3-b]- or [3,4-b]-[1,4]diazepines.
3-(甲酰氨基)-2-氯吡啶、3-(乙酰氨基)-2-氯吡啶、-4-氯吡啶或-2,4-二氯吡啶阴离子的缩合,与各种氯代-N,N-二甲基烷基胺反应,可有效生成1,2,3,4-四氢吡啶并[2,3-b]或[3,4-b]吡嗪,以及2,3,4,5-四氢-1H-吡啶并[2,3-b]或[3,4-b]-[1,4]二氮杂卓。