Synthesis of Enantioenriched α-Deuterated α-Amino Acids Enabled by an Organophotocatalytic Radical Approach
作者:Peng Ji、Yueteng Zhang、Yue Dong、He Huang、Yongyi Wei、Wei Wang
DOI:10.1021/acs.orglett.0c00154
日期:2020.2.21
preparation of diverse, enantioenriched α-deuterated α-amino acids. Distinct from the well-established two-electron transformations, this radical-based strategy offers the unrivaled capacity of the convergent unification of readily accessible feedstock carboxylic acids and a chiral methyleneoxazolidinone fragment and the simultaneous highly diastereo-, chemo-, and regioselective incorporation of deuterium
Visible-Light-Induced Decarboxylative Cyclization/Hydrogenation Cascade Reaction to Access Phenanthridin-6-yl(aryl)methanol by an Electron Donor–Acceptor Complex
作者:Wei Shi、Fang Ma、Pinhua Li、Lei Wang、Tao Miao
DOI:10.1021/acs.joc.0c01916
日期:2020.11.6
visible-light-induced decarboxylative cyclization/hydrogenation cascade reaction of α-oxocarboxylic acids and 2-isocyanobiaryls has been developed. Without the need of any external photosensitizer, oxidant, and reductant, this method offers a mild and green approach for the synthesis of diverse alcohols in moderate to good yields. A mechanism indicated that an electrondonor–acceptor complex-driven decarboxylation,
Iron-Mediated Cleavage of CC Bonds in Vicinal Tricarbonyl Compounds in Water
作者:Jasmin Mecinović、Refaat B. Hamed、Christopher J. Schofield
DOI:10.1002/anie.200806296
日期:2009.3.30
Three of a kind: Vicinaltricarbonylcompounds undergo CCcleavage mediated by ferric ions (see scheme). The observed cleavage of ninhydrin and dehydroascorbic acid has relevance for amino acid detection and the metabolism of vitamin C.
作者:Iris R. Landman、Emilio Acuña-Bolomey、Rosario Scopelliti、Farzaneh Fadaei-Tirani、Kay Severin
DOI:10.1021/acs.orglett.9b02248
日期:2019.8.16
1-Acyl triazenes can be prepared by acid-catalyzed hydration, gold/iodine-catalyzed oxidation, or oxyhalogenation of 1-alkynyl triazenes. Crystallographic analyses reveal a pronounced effect of the acyl group on the electronic structure of the triazene function. 1-Acyl triazenes display high thermal stability, and only moderate sensitivity toward hydrolysis. They are compatible with basic and oxidative
Synthesis of thioesters using an electrochemical three-component reaction involving elemental sulfur
作者:Gongbo Liu、Shuoyu Xu、Yangyang Yue、Changhui Su、Wangze Song
DOI:10.1039/d4cc01910e
日期:——
three-component reaction involving elemental sulfur is disclosed for achieving a metal-free, oxidant-free synthesis of thioesters in a high atom-economical, step-economical and chemoselective manner. A mechanistic investigation indicates that the use of elemental sulfur to trap acyl radical derived fromradical umpolung of α-keto acid with an electrochemical design can efficiently generate a carbonyl