Evans Fosu

Studies toward the imidazolyl-quinolone core of the bromotyrosine-derived alkaloid ceratinadin B

Anasuya Ghorai, Xiaofeng Meng, Lesley A. Schmid, Evans Fosu et autres

A de novo synthesis of the imidazolyl quinolone core of the marine sponge-derived alkaloid ceratinadin B was developed from 1,4-dimethoxybenzene. An acid mediated Friedel-Crafts reaction of a γ-aminobutyric acid derivative provided an aryl ketone which after bromination gave rise to the 2-aminoimidazole …

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Bis-arylation of phenylene-bridged bis-azolium salts and tetra-arylation of bis-azoles to access symmetrical and unsymmetrical CCC-aNHC pincer ligand precursors

Alan C. Cecil, Evans Fosu, B. Donnadieu, T. Keith Hollis

Copper-mediated methodologies for the arylation of bis-azolium salts and bis-azoles are efficient pathways to access symmetrical and unsymmetrical N -heterocyclic carbene precursors. The arylation of bis-azolium salts with various aryl halides was achieved in moderate yields to furnish numerous C2-arylated bis-azolium salts. …

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Dehydrogenative silylation of vinylarenes with Et3SiH catalyzed by mixed valent CCC-NHC Rh(III)/Rh(I) pincer complex

Enock D. Amoateng, B. Donnadieu, Evans Fosu, T. Keith Hollis

Selective dehydrogenative silylation of vinylarenes with tertiary silanes catalyzed by well-defined CCC–NHC pincer Rh complexes has been developed. The CCC–NHC pincer Rh precatalysts [( Bu C i C i C Bu )RhCl(µ-Cl) 2 Rh(COD)] ( 7 ), [( Bu C i C …

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Highly regioselective anti-Markovnikov hydrosilylation of alkenes under mild conditions: Application of CCC-NHC pincer Rh complexes

Enock D. Amoateng, Evans Fosu, T. Keith Hollis

A highly selective hydrosilylation of alkenes at room temperature , catalyzed by well-defined CCC–NHC pincer Rh complexes, [( Bu C i C i C Bu )RhCl 2 Py] ( 1 ), [( Bu C i C i C Bu )RhCl 2 (NHMe …

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Bis-arylation of Phenylene-bridged Bis-azolium Salts and Tetra-arylation of Bis-azoles to Access Symmetrical and Unsymmetrical CCC-aNHC Pincer Ligand Precursors

Alan C. Cecil, T. Keith Hollis, Evans Fosu, B. Donnadieu

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A Cationic Pt(II) Dinitrogen Adduct: Synthesis and Characterization of a CCC-aNHC Pincer Pt Complex with Abnormal N-Heterocyclic Carbene Donor Arms

Evans Fosu, Nghia Le, Taofiq Abdulraheem, B. Donnadieu et autres

In contrast to the reported CCC-NHC pincer ligands that contain normal N -heterocyclic carbenes (NHC), herein we report an imidazole-based abnormal NHC (aNHC) pincer ligand, CCC-aNHC. The CCC-aNHC pincer Pt complex with two aNHC donors was synthesized via the in situ metalation …

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Diels-Alder cycloaddition versus ring-opening esterification: A computational study of the mechanism of formation of oxa-norbonene lactones from the reaction of furfuryl alcohol and itaconic anhydride

Evans Fosu, Cecil H. Botchway, Richard Tia, Evans Adei

Ghana (code pays fourni par la source)

Mechanistic studies on Diels-Alder [4 + 2] cycloaddition reactions of α,β-substituted cyclobutenones: Role of substituents in regio- and stereoselectivity

Evans Fosu, Richard Tia, Evans Adei

Ghana (code pays fourni par la source)