This work describes an electrochemicalammoniumcation enabled hydropyridylation of ketone-activated alkenes under metal- and exogenous reductant free conditions giving access to β-pyridyl ketones, through dual proton-coupled electron transfer and radical cross-coupling. It features a broad substrate scope and allows a gram-scale synthesis. Ammonium chloride plays various roles in this transformation
flavanones, which included polycyclic aromatic and heterocyclic rings, were readily synthesized via oxa-Michael addition from the corresponding hydroxychalcones with a catalytic amount of aqueous cesium fluoride solution under mild conditions. This method could be applied to the scalable synthesis of eriodictyol as a known potent inhibitor of the SARS-CoV-2 spike protein.
An electroreductive 4-pyridylation of activated alkenes was developed in an undivided cell with the assistance of Ni(acac)(2) (acac = acetylacetone). This novel protocol is compatible with a broad range of electron-poor alkenes, which are commonly regarded as challenging substrates in the previous conventional approaches. Moreover, a series of cyclic voltammetric experiments were conducted to reveal the unique role of Ni(acac)(2) differentiating reduction process of reaction partners.
Corvaisier,A., Bulletin de la Societe Chimique de France, 1962, p. 528 - 535
作者:Corvaisier,A.
DOI:——
日期:——
Novel Highly Potent and Selective σ<sub>1</sub> Receptor Antagonists Related to Spipethiane
Conservative chemical modifications of the core structure of the lead spipethiane (1) afforded novel potentσ1ligands. σ1 affinity and σ1/σ2 selectivity proved to be favored by the introduction of polar functions (oxygen atom or carbonyl group) in position 3 or 4 (4−6) or by the elongation of the distance between the two hydrophobic portions of the molecule with the simultaneous presence of a carbonyl