mild visible light-induced palladium-catalyzed alkyl Heckreaction of diazo compounds and N-tosylhydrazones is reported. This method features Brønsted acid assisted generation of hybrid palladium C(sp3)-centered radical intermediate and broad reaction scope, highlighting the diverse applicability and the potential utility of this protocol in late-stage functionalization.
Rhodium(II) acetate-catalyzed reaction of ethyl 2-diazo-3-oxopent-4-enoates: Simple routes to 4-aryl-2-hydroxy-1-naphthoates and β,β-unsaturated esters. The dianion of ethyl 4-(diethylphosphono)acetoacetate as a propionate homoenolate equivalent
作者:Edward C. Taylor、Huw M.L. Davies
DOI:10.1016/s0040-4039(00)94110-8
日期:1983.1
Rhodium(II) acetate-catalyzed decomposition of ethyl 2-diazo-3-oxopent-4-enoates results in the formation of either 4-aryl-2-hydroxy-naphthoates or β,γ-unsaturated esters. In the latter transformation, the dianion of 4-(diethylphosphono)acetoacetate functions as a propionate homoenolate equivalent.
Antiproliferative Activity Predictor: A New Reliable In Silico Tool for Drug Response Prediction against NCI60 Panel
作者:Annamaria Martorana、Gabriele La Monica、Alessia Bono、Salvatore Mannino、Silvestre Buscemi、Antonio Palumbo Piccionello、Carla Gentile、Antonino Lauria、Daniele Peri
DOI:10.3390/ijms232214374
日期:——
In vitro antiproliferative assays still represent one of the most important tools in the anticancer drugdiscovery field, especially to gain insights into the mechanisms of action of anticancer small molecules. The NCI-DTP (National Cancer Institute DevelopmentalTherapeuticsProgram) undoubtedly represents the most famous project aimed at rapidly testing thousands of compounds against multiple tumor
Photocatalytic Cross-Coupling of Tetrafluoropyridine Sulfides with Vinyl Halides for the Synthesis of β,γ-Unsaturated Carbonyl Compounds
作者:Muhammad Kashif Zaman、Ruining Li、Wei Deng
DOI:10.1021/acs.joc.3c01800
日期:2023.11.17
β,γ-Unsaturated carbonyl compounds serve as versatile building blocks in organic synthesis and medicinal chemistry. Herein we reported the synthesis of β,γ-unsaturated carbonyl compounds from tetrafluoropyridine sulfides with vinyl halides. This cross-coupling reaction takes the advantage of photocatalysis, as well as zinc catalysis, which is preferred due to its less-toxic, earth abundant, and cost-effective
Cp*Ru(II) and Cp*Ru(IV)-catalyzed reactions of CHX with vinyl C–H bonds: competition between double bond homologation and olefin cyclopropanation by alkyl diazoacetate
作者:François Simal、Albert Demonceau、Alfred F. Noels、D.R.T. Knowles、Shane O'Leary、Peter M. Maitlis、O. Gusev
DOI:10.1016/s0022-328x(98)00373-8
日期:1998.5
When diazoesters are used as carbene precursors, new Ru(II) and Ru(IV) complexes bearing various substitutents tethered ligands mediate the formal carbene insertion into C-H vinyl bonds of(substituted) styrenes to yield mostly E- and Z-styrylacetic esters (e.g. 4-phenylbut-3-enoates with styrene). This rarely observed reaction competes with the cyclopropanation of the double bond. The influence of steric and electronic factors on the two competitive reactions is reported. The observation that the most efficient C-H insertion catalysts also promote the ROMP of norbornene lend support to the formation of ruthenacyclobutanes as reaction intermediates. (C) 1998 Elsevier Science S.A. All rights reserved.