光催化C-H键活化是在温和条件下用双氧选择性官能化C(sp 3 )-H键的具有挑战性的方法。在此,通过融合过渡金属催化和光催化,光活性Cu( I )–卤化物(X)(X=Cl、Br、I)簇被用来有效催化C的选择性单氧化和C-C氧化交叉偶联。 (sp 3 )–H 在光照射下与不反应的 O 2形成键。这种现代方案有望在 Cu( I ) 团簇和 O 2之间发生光诱导 SET 过程,并可能形成 Cu( II )–O 2 ˙ -物质,用于从 C(sp 3 )–H 键中提取 H 原子。该过程产生烷基自由基,与-OOH或亲核试剂反应产生氧化或交叉偶联产物,从而将Cu( I )簇介导的光氧化还原催化作用推向具有所追求选择性的功能性精细化学品。
A Robust Palladium(II)-Porphyrin Complex as Catalyst for Visible Light Induced Oxidative CH Functionalization
作者:Wai-Pong To、Yungen Liu、Tai-Chu Lau、Chi-Ming Che
DOI:10.1002/chem.201203774
日期:2013.4.26
A series of palladium(II)–porphyrin complexes that display dual emissions with lifetimes up to 437 μs have been synthesized. Among the four complexes, PdF20TPP is an efficient and robust catalyst for photoinduced oxidativeCHfunctionalization by using oxygen as terminal oxidant. α‐Functionalized tertiary amines were obtained in good to excellent yields by light irradiation (λ>400 nm) of a mixture
Magnetic nanoparticle-supported eosin Y ammonium salt: An efficient heterogeneous catalyst for visible light oxidative C–C and C–P bond formation
作者:Pinhua Li、Guan-Wu Wang、Xianjin Zhu、Lei Wang
DOI:10.1016/j.tet.2019.04.071
日期:2019.6
such as nitroalkanes, malononitrile, dimethyl malonate and H-phosphonate diesters were achieved by using a magnetic nanoparticle-supported eosin Y bis-benzyltriethylammonium salt (MNPs-Eosin Y) as catalyst and air as the sole oxidant, affording the corresponding products in good to excellent yields undermild reaction conditions. Notably, the supported eosin Y catalyst can easily be separated from the
In this communication we describe the oxidativeCCbondformation of tertiary amines with various nucleophiles under very mild and environmental friendly conditions by using mesoporous graphitic carbon nitride (mpg‐C3N4) semiconductor as a heterogeneous, metal‐free photosensitizer in combination with visiblelight and oxygen as the terminal oxidation agent. This system can be further combined with
在本通讯中,我们通过使用介孔石墨碳氮化碳(mpg-C 3 N 4)半导体作为非均相,无金属的光敏剂组合,描述了在非常温和且环境友好的条件下叔胺与各种亲核试剂的氧化CC键形成用可见光和氧气作为终端氧化剂。该系统可以进一步与脯氨酸-有机催化结合使用,以实现氧化串联光催化,这证明了当前光合作用系统的丰富化学可能性。
Flavin‐Catalyzed Aerobic Oxidative C−C Bond Formation by Metal/Light‐Free Cross‐Dehydrogenative Coupling
作者:Hazuki Miyake、Hiroki Iida
DOI:10.1002/adsc.202301427
日期:2024.2.19
Biomimetic flavin catalysts enable green and selective aerobic oxidative transformations. However, most previous studies tended to focus on reproducing the enzymatic function of flavin monooxygenase, thereby limiting the applications of flavin catalysts to oxygen-atom transfer reactions. We herein report a cross-dehydrogenativecoupling (CDC) between the sp3 C−H bond of tetrahydroisoquinolines and