Parallel synthesis of 3-aminoimidazo[1,2-a]pyridines and pyrazines by a new three-component condensation
作者:Christopher Blackburn、Bing Guan、Paul Fleming、Kazumi Shiosaki、Shirling Tsai
DOI:10.1016/s0040-4039(98)00653-4
日期:1998.5
A three-component condensation reaction between 2-aminopyridine, an aldehyde and an isonitrile catalyzed by scandium triflate affords derivatives of 3-aminoimidazo[1,2-a]pyridine; aminopyrazine reacts similarly. A library of heterocycles, prepared in high yield by parallel synthesis and purification on an ion-exchange resin, was subjected to further reactions at the amino group.
三氟甲磺酸scan催化2-氨基吡啶,醛和异腈之间的三组分缩合反应,得到3-氨基咪唑并[1,2-a]吡啶的衍生物。氨基吡嗪反应类似。通过在离子交换树脂上平行合成和纯化以高收率制备的杂环库在氨基上进行进一步反应。