A new [5 + 1] rearrangementâannulation for the regioselective formation of polyfunctionalized [1,6]naphthyridines is described. The new construction of a pyridin-2(1H)-one skeleton and its alkylation on the pyridin-2(1H)-one unit were readily achieved through a novel sequential [4 + 2] cyclizationâring openingâintramolecular cyclizationâre-cyclizationâelimination of urea process.
描述了一种新的 [5 + 1] 重新排列-环化反应,用于区域选择性生成多功能化的 [1,6]
萘啶。通过一种新颖的顺序 [4 + 2] 环化-开环-分子内环化-再环化-
尿素消除过程,成功构建了
吡啶-2(1H)-酮骨架及其在
吡啶-2(1H)-酮单元上的烷基化。