作者:Mendoza-Espinosa, Daniel、Rendón-Nava, David、Vásquez-Pérez, Jose M.、Sandoval-Chávez, Cesar I.、Alvarez-Hernández, Alejandro
DOI:10.1021/acs.organomet.0c00517
日期:——
of complexes 4a–d featuring a [Rh(CO)2I] fragment used for the detemination of the donor properties of the new triazolylidene ligands. All complexes have been fully characterized by means of 1H and 13C NMR spectroscopy, melting point, elemental analysis, and in the case of complex 3a, by X-ray crystallography. Comparison of the catalytic activity of the new rhodium complexes in C–C and C–Si bond forming
The direct olefination of aryl/alkyl halides with trimethylsilyldiazomethane (TMSD) as a C1- or C2-unit was achieved successfully via a metal carbene migratoryinsertion process, which offered a new access to afford (E)-vinyl silanes and (E)-silyl-substituted α,β-unsaturated amides in good yields and high chemoselectivity.
Pyrolysis of 1-aryl-2-(trimethylsilyl)ethyl acetates, X-C6H4CH(OCOR)CH2SiMe3 (X = m-Cl, H, p-Me, and p-MeO; R = CH3 and CF3), takes two distinct elimination pathways in varying ratios depending on solvent polarity, electron-supply from aryl groups, and nucleofugality of leaving groups.
Asymmetric Hydrosilylation of β-Silyl Styrenes Catalyzed by a Chiral Palladium Complex
作者:Yi-Fan Wang、Yu-Han He、Yan Su、Yang Ji、Rui Li
DOI:10.1021/acs.joc.1c02734
日期:2022.3.4
catalyst for asymmetrichydrosilylation of β-silyl styrenes with trichlorosilane and 23 1,2-bis(silyl) chiral compounds were produced. Good to excellent enantioselectivities were observed with 1-aryl-2-silyl ethanols, where the trichlorosilyl groups of the hydrosilylation products were selectively converted into a hydroxyl group in the presence of pre-installed trialkylsilyl groups. Asymmetric hydrosilylation