Bioinspired Organocatalytic Aerobic C–H Oxidation of Amines with an ortho-Quinone Catalyst
摘要:
A simple bioinspired ortho-quinone catalyst for the aerobic oxidative dehydrogenation of amines to imines is reported. Without any metal cocatalysts, the identified optimal ortho-quinone catalyst enables the oxidations of alpha-branched primary amines and cyclic secondary amines. Mechanistic studies have disclosed the origins of different performances of ortho-quinone vs para-quinone in biomimetic amine oxidations.
Biomimetic Oxidative Deamination Catalysis via <i>ortho</i>-Naphthoquinone-Catalyzed Aerobic Oxidation Strategy
作者:Gangadhararao Golime、Ganganna Bogonda、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acscatal.8b00992
日期:2018.6.1
oxidant and nucleophile. The current aerobic deamination reaction proceeds via the ketimine formation between ortho-naphthoquinones and amines followed by the prototropicrearrangement and hydrolysis by water, representing a biomimetic oxidative deamination of amine species in the human body by the liver and kidneys. The compatibility of ortho-naphthoquinone organocatalysts with molecular oxygen and
Radical cation intermediates in the formation of schiff bases on irradiated semiconductor powders
作者:Marye Anne Fox、Janet N. Younathan
DOI:10.1016/s0040-4020(01)88091-1
日期:1986.1
Mechanistic electrochemical investigation of the reaction revealed intermediate formation of an immonium cation in an ECE route. This species is generated via electrooxidation of an α-amino radical formed by deprotonation of the primary oxidation product, an aminium cationradical. The influence of the metal oxide surface on radicalcation reactivity is discussed.
Carbazoquinocin Analogues as Small Molecule Biomimetic Organocatalysts in Dehydrogenative Coupling of Amines
作者:Samrat Kundu、Chayan Ghosh、Abhisek Metya、Ankush Banerjee、Modhu Sudan Maji
DOI:10.1021/acs.orglett.4c00229
日期:2024.3.1
biomimetic ortho-quinone catalysts structurally resembling carbazoquinocin alkaloids have been introduced to promote tunable, metal cocatalyst-free, organocatalytic, dehydrogenative amineoxidationunderaerobicconditions. Differently substituted benzyl amines were tolerated under optimized conditions to provide imines in excellent yields. Further efficacy of the catalyst was demonstrated by synthesizing