Heterocycle-to-Heterocycle Route to Quinoline-4-amines: Reductive Heterocyclization of 3-(2-Nitrophenyl)isoxazoles
作者:Keith C. Coffman、Vy Duong、Alex L. Bagdasarian、James C. Fettinger、Makhluf J. Haddadin、Mark J. Kurth
DOI:10.1002/ejoc.201403065
日期:2014.12
A variety of quinoline-4-amines were synthesized from substituted 3-(2-nitrophenyl)isoxazoles utilizing Zn0 or Fe0 dust and HOAc via a reductive heterocyclization process. The starting isoxazoles were synthesized from readily available starting materials. A brief survey of functional groups tolerated in this reductive heterocyclization was performed and several 10-amino-3,4-dihydrobenzo[b][1,6]naphthyridin-1(2H)-one
利用 ZnO 或 FeO 粉尘和 HOAc,通过还原杂环化过程,由取代的 3-(2-硝基苯基)异恶唑合成了多种喹啉-4-胺。起始异恶唑是由容易获得的起始材料合成的。对这种还原性杂环化中耐受的官能团进行了简要调查,并发现了几种 10-氨基-3,4-二氢苯并[b][1,6]萘啶-1(2H)-酮和 9-氨基-3,4-二氢吖啶-1(2H)-合成了一个实例。