Three-step synthesis of 2,5,7-trisubstituted indoles from N-acetyl-2,4,6-trichloroaniline using Pd-catalyzed site-selective cross-coupling
作者:Miyuki Yamaguchi、Kei Manabe
DOI:10.1039/c7ob01547j
日期:——
We report a facile three-step synthesis of 2,5,7-trisubstituted indoles from N-acetyl-2,4,6-trichloroaniline, with the first step featuring Pd/dihydroxyterphenylphosphine (DHTP)-catalyzed ortho-selective Sonogashira coupling followed by cyclization to afford 2-substituted 5,7-dichloroindoles. Subsequent introduction of aryl or alkenyl groups at the C7 position was achieved by Pd/DHTP-catalyzed site-selective
我们报道了从N-乙酰基2,4,6-三氯苯胺容易地三步合成2,5,7-三取代的吲哚,第一步是Pd /二羟基叔苯基膦(DHTP)催化的邻位选择性Sonogashira偶联,然后环化得到2-取代的5,7-二氯吲哚。随后在C7位置引入芳基或烯基是通过Pd / DHTP催化的位点选择性Kumada–Tamao–Corriu偶联,并在C5位置进一步取代氯(Suzuki–Miyaura偶联或Buchwald–Hartwig胺化)提供2,5,7-三取代的吲哚。