4(1H)-Quinolinone Alkaloids. An Efficient Synthesis of Graveoline by Palladium-Catalysed ReductiveN-Heterocyclisation
摘要:
An efficient synthesis of the 4H-quinolone alkaloid graveoline has been achieved by a route featuring an Pd(II)-catalysed reductive N-heterocyclisation [CO(3 MPa), Pd(TMB)(2), TMPhen, 170 degrees C, 3h] of 2'-nitrochalcone as a key step.
Synthesis and cdc25B inhibitory activity evaluation of chalcones
作者:Fei Zhao、Qing-Jie Zhao、Jing-Xia Zhao、Da-Zhi Zhang、Qiu-Ye Wu、Yong-Sheng Jin
DOI:10.1007/s10600-013-0563-7
日期:2013.5
A library of sixty-five chalcones was prepared for screening against the protein phosphatase, cdc25B. From this library, thirteen compounds were found having good inhibitory activity. Two compounds have excellent activity and can be used for the design of more potent antiproliferative agents.
(±)-2-Aryl-2,3-dihydro-4(1H)-quinolinones by a tandem reduction-Michael addition reaction
作者:Richard A. Bunce、Baskar Nammalwar
DOI:10.1002/jhet.624
日期:2011.5
(±)‐2‐aryl‐2,3‐dihydro‐4(1H)‐quinolinones has been developed from chalcones prepared from 2′‐nitroacetophenone and a series of substituted benzaldehydes. The cyclization sequence is initiated by reduction of the nitro group under dissolving metal conditions using iron powder in concentrated hydrochloric acid. Milder conditions, using acetic acid or acetic acid–phosphoric acid as the reaction medium, were less
2-Substituted-4-quinolones 2 and the corresponding 2,3-dihydro-2-substituted-4-quinolones 3 have been obtained by reduction with CO at 170 °C and 30 atm of 2-nitrochalcones 1, catalysed by Ru3(CO)12 with DIAN-Me as co-catalyst in ethanol–water.
Synthesis of 2-carboxyaniline-substituted maleimides from 2′-nitrochalcones
作者:Nicolai A. Aksenov、Dmitrii A. Aksenov、Daniil D. Ganusenko、Igor A. Kurenkov、Alexander V. Leontiev、Alexander V. Aksenov
DOI:10.1039/d3ob00197k
日期:——
A practical, one-pot approach to 3-anilino-4-(het)arylmaleimides by simple heating of aqueous DMSO solution of 2′-nitrochalcones with potassiumcyanide in the presence of formic acid has been developed. This new reaction provides effective access to a variety of β-substituted α-aminomaleimides which have recently become a subject of growing interest as small, easily modified and environmentally responsive
A Diastereoselective Assembly of Tetralone Derivatives via a Tandem Michael Reaction and <i>ipso</i>-Substitution of the Nitro Group
作者:Nicolai A. Aksenov、Dmitrii A. Aksenov、Daniil D. Ganusenko、Igor A. Kurenkov、Alexander V. Aksenov
DOI:10.1021/acs.joc.3c00134
日期:2023.5.5
A highlydiastereoselective tandem reaction of 2′-nitrochalcones is reported, involving Michael addition and a subsequent ipso-substitution of the nitro group to produce 1-tetralones with two contiguous chiral centers. A related annulation reaction of 2′-nitrochalcones with potassium cyanide affording 1-indanones with a C3-quaternary chiral center is also demonstrated.