89876-11-9Relevant articles and documents
Visible Light Induced Br?nsted Acid Assisted Pd-Catalyzed Alkyl Heck Reaction of Diazo Compounds and N-Tosylhydrazones
Dubrovina, Anastasiia,Gevorgyan, Vladimir,Kvasovs, Nikita,Zhang, Ziyan
supporting information, (2021/11/30)
A mild visible light-induced palladium-catalyzed alkyl Heck reaction of diazo compounds and N-tosylhydrazones is reported. A broad range of vinyl arenes and heteroarenes with high functional group tolerance, as well as a range of different diazo compounds, can efficiently undergo this transformation. This method features Br?nsted acid-assisted generation of hybrid palladium C(sp3)-centered radical intermediate, which allowed for new selective C?H functionalization protocol.
Preparation method of trans-4-phenyl-3-ethyl crotonate compound
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Paragraph 0043-0046, (2019/07/04)
The invention belongs to the technical field of pharmaceutical chemical intermediates and related chemistry, and relates to a preparation method of a trans-4-phenyl-3-ethyl crotonate compound. The preparation method comprises the following steps: using a
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
Simal, Francois,Demonceau, Albert,Noels, Alfred F.,Knowles,O'Leary, Shane,Maitlis, Peter M.,Gusev
, p. 163 - 170 (2007/10/03)
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.
RHODIUM(II) ACETATE-CATALYZED REACTION OF ETHYL 2-DIAZO-3-OXOPENT-4-ENOATES: SIMPLE ROUTES TO 4-ARYL-2-HYDROXY-1-NAPHTHOATES AND β,γ-UNSATURATED ESTERS. THE DIANION OF ETHYL 4-(DIETHYLPHOSPHONO)ACETOACETATE AS A PROPIONATE EQUIVALENT
Taylor, Edward C.,Davies, Huw M. L.
, p. 5453 - 5456 (2007/10/02)
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 functi