Aerobic α‐Oxidation of N‐Substituted Tetrahydroisoquinolines to Dihydroisoquinolones via Organo‐photocatalysis
作者:Kim Aganda、Boseok Hong、Anna Lee
DOI:10.1002/adsc.201801301
日期:——
An efficient visible‐light‐induced α‐oxidation of N‐substituted tetrahydroisoquinolines to dihydroisoquinolones has been developed using eosinY as an organo‐photocatalyst and oxygen as a green oxidant. The reactions were carried out under mild reaction conditions; the desired dihydroisoquinolones were obtained in up to 96% yield at room temperature under oxygen atmosphere. This transformation provides
Reactions Catalysed by a Binuclear Copper Complex: Relay Aerobic Oxidation of <i>N</i>
-Aryl Tetrahydroisoquinolines to Dihydroisoquinolones with a Vitamin B1 Analogue
N‐Aryl tetrahydroisoquinolines were oxidised to dihydroisoquinolones through the relay catalysis of a binuclear paddle‐wheel coppercomplex and a vitaminB1analogue with oxygen as oxidant. Mechanistic studies revealed that the copper catalyst oxidises amines to the corresponding iminium salts, which are then oxygenated to lactam products by catalysis of the vitaminB1analogue.
Porphyrin-Catalyzed Oxidation of N-Substituted Tetrahydroisoquinolines to Dihydroisoquinolones
作者:Ao Li、Bin Pan、Yu-Long Li、Qin Ouyang、Chao Mu、Na Wang
DOI:10.1055/a-1345-3491
日期:2021.4
A visible-light-induced direct α-oxygenation of N-substituted 1,2,3,4-tetrahydroisoquinoline derivatives has been successfully developed. Tetraphenylporphyrinatozinc(II) has been identified as an effective and inexpensive photocatalyst for this transformation with a wide range of substrates. This protocol provides a convenient route to the desired products in moderate to good yields at room temperature
Click-based conjugated microporous polymers as efficient heterogeneous photocatalysts for organic transformations
作者:Shaolin Gan、Yan Zeng、Jiaxin Liu、Junqi Nie、Cuifen Lu、Chao Ma、Feiyi Wang、Guichun Yang
DOI:10.1039/d1cy02076e
日期:——
Due to their tunable porous structure and photoelectric properties, conjugatedmicroporouspolymers (CMPs) have provided a new platform for visible-light driven photocatalysis. Some synthetic methods like Sonogashira, Suzuki, oxidative coupling and trimerization reactions have been commonly employed to synthesize photocatalytically active CMPs, but the copper promoted azide–alkyne click reaction is
Visible‐Light‐Driven C−H Oxidation of Cyclic Tertiary Amines: Access to Synthetic
<i>Strychnos</i>
Alkaloids with Antiviral Activity
作者:Anton A. Guryev、Friedrich Hahn、Manfred Marschall、Svetlana B. Tsogoeva
DOI:10.1002/chem.201900078
日期:2019.3.15
Air and visible light have been used in facile direct C−H oxidation of cyclic tertiaryamines at ambient conditions, employing organic dyes as photocatalysts and LED. Tolerance of this new environmentally compatible protocol to various side‐chain derivatizations of tryptoline and tetrahydroisoquinoline substrates was demonstrated. The developed method provides a straightforward and sustainable route
空气和可见光已在环境条件下用于环叔胺的直接CH-H氧化,使用有机染料作为光催化剂和LED。证明了这种新的环境兼容方案对色氨酸和四氢异喹啉底物的各种侧链衍生化的耐受性。所提出的方法提供了朝向δ内酰胺类,其功能强的抗病毒性质的直接的和可持续的路线(EC 50下降到4.6±1.8μ米)针对人巨细胞病毒(HCMV)。明显的优势,易于获得且价格便宜,试剂,有机染料,可见光,空气/ O 2 以及原子效率,使该系统对于具有抗病毒活性的通用型金丝瓜碱生物碱衍生物的合成具有很高的吸引力。