109296-23-3Relevant academic research and scientific papers
One-pot Sonogashira–Hydroarylation reaction catalyzed by anionic palladium complexes in an aqueous medium
Dziadas, M.,Trzeciak, A. M.,Wójcik, E.
supporting information, (2022/01/26)
It was found that anionic Pd(II) complexes of type [CA]2[PdCl4] and [CA]2[Pd2Cl6] (CA = imidazolium or pyridinium cation) are effective catalysts for copper-free Sonogashira coupling in an aqueous med
Synthesis of Highly Substituted Polyenes by Palladium-Catalyzed Cross–Couplings of Sterically Encumbered Alkenyl Bromides and N-Tosylhydrazones
Paraja, Miguel,Barroso, Raquel,Cabal, M. Paz,Valdés, Carlos
, p. 1058 - 1062 (2017/03/27)
A new method for the synthesis of polysubstituted conjugated dienes is described, through the palladium-catalyzed cross-coupling between N-tosylhydrazones and alkenyl bromides. The reaction proceeds efficiently when a combination of a highly substituted bromoalkene and a hydrazone derived from a ketone are employed, pointing to the convenience of a sterically encumbered environment. This unprecedented process allows for the stereocontrolled preparation of highly substituted dienes and polyenes. (Figure presented.).
Stereoselective synthesis of syn-configured α-allenols by rhodium-catalyzed reaction of alkynyl oxiranes with arylboronic acids
Miura, Tomoya,Shimada, Masahiko,De Mendoza, Paula,Deutsch, Carl,Krause, Norbert,Murakami, Masahiro
supporting information; experimental part, p. 6050 - 6054 (2009/12/26)
(Chemical Equation Presented) A rhodium-catalyzed reaction of alkynyl oxiranes with arylboronic acids affords syn-configured α-allenols with high diastereoselectivity. The reaction is initiated by addition of an arylrhodium(I) species onto the alkyne moie
SURFACE PHOTOCHEMISTRY: A "SYMMETRY FORBIDDEN" SIGMATROPIC HYDROGEN SHIFT MEDIATED BY CdS.
Mayo, Paul de,Wenska, Grazyna
, p. 1661 - 1670 (2007/10/02)
Excitation of CdS in the absence of oxygen in the presence of cyclic derivatives of diphenylcyclobutene gave the cation radical of the latter which underwent a reversible double bond migration.The structures of the products were established on the basis of spectral data ((1)H, (13)C NMR, MS, UV).Tests were performed to show that the reaction proceeds, at least in part, intramolecularly, and, therefore, represents the first example of a suprafacial sigmatropic hydrogen shift via a radical cation.This suprafacial pathway is symmetry forbidden in closed shell systems.Oxidation products were isolated when the irradiation was performed in an aerated system.The use of excited 9,10-dicyanoanthracene as an electron acceptor did not lead to the expected products; instead the sensitizer was consumed and two thermally unstable products were isolated.Their formation could be quenched by 1,2,4-trimethoxybenzene.
Surface Photochemistry: a Sigmatropic Hydrogen Shift mediated by CdS
Mayo, Paul de,Wenska, Grazyna
, p. 1626 - 1627 (2007/10/02)
Excitacion of CdS in the presence of 7,8-diphenylbicyclooct-7-ene gave the cation radical of the latter which underwent a reversible sigmatropic hydrogen shift; this is the first such observation in a radical cation.
