Photoredox-mediated C–H bond alkylation of 6-aryl-2,2′-bipyridines with N-(acyloxy)phthalimides is reported. The reaction exhibits excellent functional group tolerance, including chiral aliphatic groups. The influence of the incorporated C6′-alkyl group on the photophysical properties of the corresponding (N^N^C) cyclometalated Pt(II) complexes is described, including chiroptical properties.
据报道,光氧化还原介导的6-芳基-2,2'-联吡啶与N-(酰氧基)邻苯二甲酰亚胺的CH键烷基化。该反应显示出优异的官能团耐受性,包括手性脂族基团。描述了结合的C 6'-烷基对相应的(N ^ N ^ C)环金属化的Pt(II)配合物的光物理性质的影响,包括手性。
Copper-Catalyzed Decarboxylative Radical Silylation of Redox-Active Aliphatic Carboxylic Acid Derivatives
作者:Weichao Xue、Martin Oestreich
DOI:10.1002/anie.201706611
日期:2017.9.11
A decarboxylative silylation of aliphatic N‐hydroxyphthalimide (NHPI) esters using Si−B reagents as silicon pronucleophiles is reported. This C(sp3)−Si cross‐coupling is catalyzed by copper(I) and follows a radical mechanism, even with exclusion of light. Both primary and secondary alkyl groups couple effectively, whereas tertiary alkyl groups are probably too sterically hindered. The functional‐group
Organocatalytic decarboxylative alkylation of <i>N</i>-hydroxy-phthalimide esters enabled by pyridine-boryl radicals
作者:Liuzhou Gao、Guoqiang Wang、Jia Cao、Dandan Yuan、Cheng Xu、Xuewen Guo、Shuhua Li
DOI:10.1039/c8cc06152a
日期:——
The decarboxylative alkylation of N-hydroxyphthalimide (NHPI) based reactive esters with olefins has been achieved via an organocatalytic strategy. Control experiments and density functional theory calculations suggest that these reactions involve a boryl-radical mediated decarboxylation pathway, which is different from the single electron transfer involved in decarboxylative alkylation reactions reported
Photoredox-catalyzed decarboxylative alkylation/cyclization of alkynylphosphine oxides: a metal- and oxidant-free method for accessing benzo[<i>b</i>]phosphole oxides
By photoredox-catalysis, alkylation/aryl cyclization of alkynylphosphine oxides towards benzo[b]phospholes has been realized under metal- and oxidant-free conditions at room temperature.
通过光氧化催化,在室温无金属和氧化剂条件下,实现了炔膦氧化物向苯并[b]膦的烷基化/芳基环化。
Organophotoredox-Catalyzed Formation of Alkyl–Aryl and −Alkyl C–S/Se Bonds from Coupling of Redox-Active Esters with Thio/Selenosulfonates
作者:Yue Dong、Peng Ji、Yueteng Zhang、Changqing Wang、Xiang Meng、Wei Wang
DOI:10.1021/acs.orglett.0c03624
日期:2020.12.18
A mild organophotoredox synthetic protocol for forming a Csp3–S/Se bond by reacting widespread redox-active esters with thio/selenosulfonates has been developed. The power of the synthetic manifold is fueled by an unprecedented broad substrate scope and wide functional group tolerance.
已经开发出一种温和的有机光氧化还原合成方案,通过使广泛的氧化还原活性酯与硫代/硒磺酸盐反应形成 C sp 3 –S/Se 键。前所未有的广泛底物范围和广泛的官能团耐受性推动了合成歧管的力量。