The synthesis of chromenoquinolines via cyclization of different substituted anilines or naphthylamine with O-propargylated salicylaldehydes using Cul/La(OTf) 3 as an efficient catalyst in the reflux temperature of acetonitrile is reported.
Copper-Catalyzed Aza-Diels–Alder Reaction and Halogenation: An Approach To Synthesize 7-Halogenated Chromenoquinolines
作者:Xiaoqiang Yu、Jiao Wang、Zhanwei Xu、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.orglett.6b01065
日期:2016.5.20
A new halogenation method to construct halogen-substituted quinoline moieties is described. The Cu-catalyzed intramolecular aza-Diels–Alder reaction and halogenation reaction proceeded smoothly under mild conditions to produce the corresponding 7-chloro-6H-chromeno[4,3-b]quinolines and 7-chloro-6H-thiochromeno[4,3-b]quinolines in satisfactory yields.
描述了构建卤素取代的喹啉部分的新的卤化方法。铜催化的分子内氮杂-Diels-Alder反应和卤化反应在温和条件下平稳进行,生成了相应的7-氯-6 H-氧化铬[4,3- b ]喹啉和7-氯-6 H-硫代氧化铬[4] ,3- b ]喹啉具有令人满意的产率。
A novel strategy for the synthesis of 6H-chromeno [4, 3-b] quinoline by intramolecular Heck cyclization
A novel procedure for the synthesis of various derivatives of 6H-chromeno [4, 3-b] quinolines from intramolecular Heck reaction of 2-chloro-3-(phenoxymethyl) quinolines is described in this study. Intramolecular cyclization of N-alkylated indoles was efficiently investigated as well. The reaction is catalyzed by bis (triphenylphosphine) palladium (II) dichloride in acetonitrile at 80 °C.
在这项研究中描述了一种从2-氯-3-(苯氧甲基)喹啉的分子内Heck反应合成6 H-色酚[4,3- b ]喹啉的各种衍生物的新方法。还有效地研究了N-烷基化的吲哚的分子内环化。该反应由双(三苯基膦)二氯化钯(II)在乙腈中于80°C催化。