Synthesis of cyclic dienamide using ruthenium-catalyzed ring-closing metathesis of ene–ynamide
摘要:
Ring-closing metathesis of ene-ynamide, which has alkene and ynamide moieties in a molecule, using a second-generation ruthenium carbene complex produced nitrogen-containing heterocycles, which have a dienamide moiety, in high yields. Diels-Alder reaction of the cyclized product with dienophile proceeded smoothly to give an indole or quinoline derivative in high yield. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of cyclic dienamide using ruthenium-catalyzed ring-closing metathesis of ene–ynamide
摘要:
Ring-closing metathesis of ene-ynamide, which has alkene and ynamide moieties in a molecule, using a second-generation ruthenium carbene complex produced nitrogen-containing heterocycles, which have a dienamide moiety, in high yields. Diels-Alder reaction of the cyclized product with dienophile proceeded smoothly to give an indole or quinoline derivative in high yield. (c) 2006 Elsevier Ltd. All rights reserved.
Ynamide Carbopalladation: A Flexible Route to Mono‐, Bi‐ and Tricyclic Azacycles
作者:Craig D. Campbell、Rebecca L. Greenaway、Oliver T. Holton、P. Ross Walker、Helen A. Chapman、C. Adam Russell、Greg Carr、Amber L. Thomson、Edward A. Anderson
DOI:10.1002/chem.201501710
日期:2015.9
Bromoenynamides represent precursors to a diversity of azacycles by a cascade sequence of carbopalladation followed by cross‐coupling/electrocyclization, or reduction processes. Full details of our investigations into intramolecular ynamidecarbopalladation are disclosed, which include the first examples of carbopalladation/cross‐coupling reactions using potassium organotrifluoroborate salts; and an
Reductive Cyclization of Bromoenynamides with Alcohols as Hydride Source: Synthesis and Reactions of 2-Amidodienes
作者:Rebecca L. Greenaway、Craig D. Campbell、Helen A. Chapman、Edward A. Anderson
DOI:10.1002/adsc.201200703
日期:2012.11.26
Under basic conditions in alcoholic solvents, bromoenynamides undergo palladium-catalyzed cyclization to cyclic 2-amidodienes in good to excellent yields. This process represents the first use of an alcohol as a hydride source in an alkynecarbopalladation/termination sequence, with the site selectivity of the reduction showing a strong dependence on the tethering ring size (5–8), and the nature of
Photoinduced oxidative cyclopropanation of ene-ynamides: synthesis of 3-aza[<i>n</i>.1.0]bicycles <i>via</i> vinyl radicals
作者:Yongming Deng、Jason Zhang、Bradley Bankhead、Jonathan P. Markham、Matthias Zeller
DOI:10.1039/d1cc02016a
日期:——
first photoinduced synthesis of polyfunctionalized 3-aza[n.1.0]bicycles from readily available ene-ynamides and 2,6-lutidine N-oxide using an organic acridinium photocatalyst is reported. Applying a photocatalytic strategy to the reactive distonic cation vinyl radical intermediate from ynamide, a series of bio-valuable 3-azabicycles, including diverse 3-azabicyclio[4.1.0]heptanes and 3-azabicyclo[5