Indium mediated allylation of quinoline and isoquinoline activated by phenyl chloroformate
作者:Seung Hwan Lee、Young Sang Park、Mi Hae Nam、Cheol Min Yoon
DOI:10.1039/b405217j
日期:——
Quinoline and isoquinolineactivated by phenyl chloroformate were allylated using indium and allyl bromides in THF at room temperature to give the corresponding allyldihydroquinoline and allyldihydroisoquinoline in good to high yields.
Chiral Helical Oligotriazoles: New Class of Anion-Binding Catalysts for the Asymmetric Dearomatization of Electron-Deficient <i>N</i>-Heteroarenes
作者:Mercedes Zurro、Sören Asmus、Stephan Beckendorf、Christian Mück-Lichtenfeld、Olga García Mancheño
DOI:10.1021/ja507940k
日期:2014.10.8
Helical chirality and selective anion-binding processes are key strategies used in nature to promote highly enantioselective chemical reactions. Although enormous efforts have been made to develop simple helical chiral systems and thus open new possibilities in asymmetriccatalysis and synthesis, the efficient use of synthetic oligo- and polymeric helical chiral catalysts is still very challenging
First Example of Functionalization of Activated Quinolines by Indoles Using CeCl<sub>3</sub>·7H<sub>2</sub>O
作者:J. S. Yadav、B. V. Reddy、K. Sathaiah、P. Vishnumurthy
DOI:10.1055/s-2005-918930
日期:——
Indoles undergo smooth addition to activated quinolines and isoquinolines in the presence of CeCl3·7H2O under extremely mild conditions to provide 2-(1H-3indolyl)-1,2-dihydroquinolines and isoquinolines in excellent yields with high selectivity. It is entirely a new protocol to functionalize both indoles and quinolines in a single-step operation.
Addition of indoles and pyrroles to activated quinolines and isoquinolines is achieved using 10 mol% of indium(III) chloride as a catalyst to produce 2-(1H -indol-3-yl)-1,2 -dihydroquinolines and l-(1H -indol-3-yl)-1,2 -dihydroisoquinolines in excellent yields with high selectivity. This method is very useful for the functionalization of both indoles and quinolines in a one-pot operation.
Allyltrimethylsilane and trimethylsilyl cyanide undergo smooth addition to N-acylated quinolines in the presence of a catalytic amount of iodine to afford 2-allyl- and 2-cyano-1,2-dihydroquinoline derivatives, respectively in good yields with high chemo- and regioselectivity. A variety of functionalgroups such as alkyl, alkoxy, halo, and nitro functionalities are tolerated under the reaction conditions