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。
An N-(acetoxy)phthalimide motif as a visible-light pro-photosensitizer in photoredox decarboxylative arylthiation
作者:Yunhe Jin、Haijun Yang、Hua Fu
DOI:10.1039/c6cc06994k
日期:——
An efficient visible-light photoredox decarboxylative coupling of N-(acetoxy)phthalimides with aryl thiols has been developed. The reaction was performed well at room temperature with good tolerance of functional groups. Importantly, the...
Photocatalyzed redox-neutral decarboxylative alkylation of heteroaryl methanamines
作者:Pengfei Niu、Jingya Yang、Yong Yuan、Yongxin Zhang、Chenxing Zhou、Xiazhen Bao、Congde Huo
DOI:10.1039/d0gc04094k
日期:——
NHPI esters derived fromaliphaticcarboxylic acids has been developed. By employing a copper complex as a photocatalyst with blue LED irradiation, NHPI esters underwent one-electron reduction and heteroaryl methenamine derivatives underwent one-electron oxidation in one photo-redox catalytic cycle to formradical intermediates, respectively, followed by the recombination of these two radicals to form
heterocycles has been realized via C(sp3)‐centered radical C(sp2)−C(sp3) bond formation under oxidant‐free conditions at room temperature. This reaction readily incorporates various functional alkyl groups into heterocyclic compounds without observation of any alkyl radicalrearrangement and represents a mild and general tool for the preparation of valuable alkyl group‐functionalized heterocyclic compounds.