Tandem Pd-Catalyzed Double C−C Bond Formation: Effect of Water
作者:David I. Chai、Mark Lautens
DOI:10.1021/jo900053b
日期:2009.4.17
A highly efficient water-accelerated palladium-catalyzed reaction of gem-dibromoolefins with a boronicacid via a tandem Suzuki−Miyaura coupling and direct arylation is reported. A wide range of aryl, alkenyl, and alkyl boronicacids, as well as a variety of substitution patterns on the phenyl ring, are tolerated. Additionally, mechanistic studies were conducted to ascertain the order of the couplings
Synthesis of 3-aryl-2-aminoquinolines: palladium-catalyzed cascade reactions of gem-dibromovinylanilines with tert-butyl isocyanide and arylboronic acids
作者:Langxi Hu、Weijun Gui、Zichen Liu、Baishan Jiang
DOI:10.1039/c4ra05670a
日期:——
A three-component cascade reactioninvolving gem-dibromovinylanilines, tert-butyl isocyanide and arylboronic acids for the efficient synthesis of 3-aryl-2-aminoquinolines has been developed. The reaction proceeds throughpalladium-catalyzedisocyanideinsertion, intramolecular cyclization of gem-dibromovinylanilines followed by Suzuki coupling with arylboronic acids, and the corresponding products
Facile synthesis of 2-amino-3-bromoquinolines by palladium-catalyzed isocyanide insertion and cyclization of gem-dibromovinylanilines
作者:Baishan Jiang、Langxi Hu、Weijun Gui
DOI:10.1039/c4ra00821a
日期:——
A novel and efficient synthesis of 2-amino-3-bromoquinolines through palladium-catalyzed isocyanide insertion followed by intramolecular cyclization of gem-dibromovinylanilines was developed.
Indole tethered 1,6-enynes were designed and prepared for the first time and then used to achieve an electrochemical annulation-iodosulfonylation reaction. The reaction of indole-tethered 1,6-enynes with arylsulfonyl hydrazide and KI led to unprecedented iodosulfonated pyrrolo[1,2-a]indoles in moderate to high yields under sustainable electrochemical oxidative conditions, which may open new avenues
首次设计和制备了吲哚束缚的1,6-烯炔,并用于实现电化学环化-碘磺酰化反应。吲哚束缚的1,6-烯炔与芳基磺酰肼和KI的反应在可持续的电化学氧化条件下以中等到高产率产生了前所未有的碘磺化吡咯并[1,2- a ]吲哚,这可能为吡咯的形成开辟新途径[1,2- a ]吲哚。
Chiral phosphoric acid-catalyzed transfer hydrogenation of 3,3-difluoro-3<i>H</i>-indoles
Abstract A convenient and efficient method for the synthesis of optically active difluoro-substituted indoline derivatives starting from the corresponding 3H-indoles by chiral phosphoric acid-catalyzed transfer hydrogenation was developed. Using Hantzsch ester as the hydrogen source under mild reaction conditions, the target products can be obtained with excellent yield and enantioselectivity. Beilstein