A Bifunctional Photoaminocatalyst for the Alkylation of Aldehydes: Design, Analysis, and Mechanistic Studies
作者:Thomas Rigotti、Antonio Casado-Sánchez、Silvia Cabrera、Raúl Pérez-Ruiz、Marta Liras、Víctor A. de la Peña O’Shea、José Alemán
DOI:10.1021/acscatal.8b01331
日期:2018.7.6
visible light conditions. To corroborate the experimental observations, ground state geometry optimization and energy transition studies of thioxanthone and bifunctional catalyst 4c were optimized by time-dependent density functional theory (TD DFT) calculations. The alkylation of aldehydes with this photoaminocatalyst works with high enantioselectivities and yields due to the stereoelectronic properties
Allylation of aldehydes by dual photoredox and nickel catalysis
作者:Andrea Gualandi、Giacomo Rodeghiero、Adriana Faraone、Filippo Patuzzo、Marianna Marchini、Francesco Calogero、Rossana Perciaccante、Thomas Paul Jansen、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1039/c9cc03344k
日期:——
Here we report the application of dualnickel/photoredox catalysis to the allylation of aliphatic, aromatic and heteroaromatic aldehydes by using commercially available reagents. The process utilizes the combination of a Ni(II) complex, [Ru(bpy)3]2+ as a photoredox catalyst, and allylacetate under blue LED irradiation, and allows the synthesis of a large variety of homoallylic alcohols.
Lead-Halide Perovskites for Photocatalytic α-Alkylation of Aldehydes
作者:Xiaolin Zhu、Yixiong Lin、Yue Sun、Matthew C. Beard、Yong Yan
DOI:10.1021/jacs.8b08720
日期:2019.1.16
Cost-effective and efficient photocatalysis are highly desirable in chemical synthesis. Here we demonstrate that readily prepared suspensions of APbBr3 (A = Cs or methylammonium (MA)) type perovskite colloids (ca. 2-100 nm) can selectively photocatalyze carbon-carbonbond formation reactions, i.e., α-alkylations. Specifically, we demonstrate α-alkylation of aldehydes with a turnover number (TON) of
Organocatalytic Enantioselective Alkylation of Aldehydes with [Fe(bpy)<sub>3</sub>]Br<sub>2</sub> Catalyst and Visible Light
作者:Andrea Gualandi、Marianna Marchini、Luca Mengozzi、Mirco Natali、Marco Lucarini、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1021/acscatal.5b01573
日期:2015.10.2
[Fe(bpy)3]Br2 complex in the presence of visiblelight and the MacMillan catalyst 3 (20 mol %) are highly effective in promoting an enantioselective organocatalytic photoredox alkylation of aldehydes with various α-bromo carbonyl compounds. Reaction yields of isolated compounds and enantioselectivities are very good and comparable to the ones obtained by [Ru(bpy)3]2+, organic dyes, or semiconductors, in
A fixed-bed photoreactor using conjugated nanoporous polymer-coated glass fibers for visible light-promoted continuous photoredox reactions
作者:Wei Huang、Beatriz Chiyin Ma、Di Wang、Zi Jun Wang、Run Li、Lei Wang、Katharina Landfester、Kai A. I. Zhang
DOI:10.1039/c6ta10768k
日期:——
Here, we report on a fixed-bed photoreactor containing conjugated nanoporous polymer-coated glass fibers for visible light-promoted, heterogeneous photoredox reactions in a continuous flow system.