An efficient synthesis of benzo[b]benzofurano[2,3-e]-[1,6]naphthyridine-8-ones

Autor: Wei Zhao, Yong-Yang Wang, Jian-Ying Wu, Dan Wu, Dao-Lin Wang
Rok vydání: 2015
Předmět:
Zdroj: Chinese Chemical Letters. 26:251-254
ISSN: 1001-8417
DOI: 10.1016/j.cclet.2014.11.005
Popis: An efficient method for the synthesis of benzo[b]benzofurano[2,3-e][1,6]naphthyridine-8-one derivatives has been developed via Pictet-Spengler reaction of 4-(3-aminobenzofuran-2-yl)quinoline-2-ones, which could be obtained from alkylation of 4-bromomethylquinoline-2-ones with salicylonitrile and subsequent Thorpe-Ziegler isomerization, with aromatic aldehydes under p-TsOH as catalyst in good yields.
Databáze: OpenAIRE