Intramolecular Heck reaction: A facile sequential one-pot synthesis of 1,2,3,4-tetrahydrobenzo[b][1,6]naphthyridines
作者:Puchakayala Bharath Kumar Reddy、Kanakaraju Ravi、Kukkamudi Mahesh、Panaganti Leelavathi
DOI:10.1016/j.tetlet.2018.09.068
日期:2018.11
A simple and convenient sequential one-pot synthesis of 1,2,3,4-tetrahydrobenzo[b][1,6] naphthyridines has been developed. The reductive amination of 2-chloro-3-formylquinolines with various amines in the presence of sodium borohydride provided the corresponding secondary amines in high yields. Further, a sequential one-pot reaction involving N-allylation and intramolecular Heck type 6-exo-trig cyclization
已经开发了一种简单,方便的顺序一锅法合成1,2,3,4-四氢苯并[ b ] [1,6]萘啶。在硼氢化钠存在下,用各种胺对2-氯-3-甲酰基喹啉进行还原性胺化反应可提供高产率的相应仲胺。此外,对仲胺进行了涉及N-烯丙基化和分子内Heck型6-exo-trig环化的顺序一锅反应,得到了所需的1,2,3,4-四氢苯并[ b ] [1,6]对-萘啶衍生物的产率高至高。