The amide C–N bond of isatins as the directing group and the internal oxidant in Ru-catalyzed C–H activation and annulation reactions: access to 8-amido isocoumarins
作者:Partha Pratim Kaishap、Bipul Sarma、Sanjib Gogoi
DOI:10.1039/c6cc04461a
日期:——
The amide C–N bond of isatins was used as the oxidizing directing group for 4C–H activation and annulation reactions with alkynes.
吲哚酮的酰胺C-N键被用作氧化定向基团,用于与炔烃进行4C-H活化和环化反应。
Silver-containing microemulsion as a high-efficient and recyclable catalytic system for hydration of alkynes
A silver-catalyzed highly efficient and regioselective synthesis of ketones from a wide range of alkynes is described. The reaction is dramatically accelerated by its performance in aqueous emulsion, which is self-assembled by the addition of silver perfluorooctanesulfonate (1) and perfluorooctanesulfonic acid (PFOS) to water. The reaction is conducted under convenient conditions with broad substrate
Ru(<scp>ii</scp>)-Catalyzed annulation of benzamidines and alkynes by C–H/N–H activation: a facile synthesis of 1-aminoisoquinolines
作者:P. P. Kaishap、G. Duarah、D. Chetia、S. Gogoi
DOI:10.1039/c7ob00389g
日期:——
An inexpensive Ru(II) complex catalyzes the oxidative annulation reaction of disubstituted alkynes with benzamidines to provide highly valuable 1-aminoisoquinolines in high yields. The reaction also features excellent regioselectivity with some unsymmetrical alkynes.
Ligand-controlled iridium-catalyzed semihydrogenation of alkynes with ethanol: highly stereoselective synthesis of <i>E</i>- and <i>Z</i>-alkenes
作者:Jinfei Yang、Chengniu Wang、Yufeng Sun、Xuyan Man、Jinxia Li、Fei Sun
DOI:10.1039/c8cc09714c
日期:——
iridium-catalyzed semihydrogenation of alkynes to E- and Z-alkenes with ethanol was developed. Effective selectivity control was achieved by ligand regulation. The use of 1,2-bis(diphenylphosphino)ethane (DPPE) and 1,5-cyclooctadiene (COD) was critical for the stereoselective semihydrogenation of alkynes. The general applicability of this procedure was highlighted by the synthesis of more than 40 alkenes, with