Surfactant-Type Brønsted Acid Catalyzed Dehydrative Nucleophilic Substitutions of Alcohols in Water
作者:Seiji Shirakawa、Shū Kobayashi
DOI:10.1021/ol062813j
日期:2007.1.1
A protocol for the dehydrative nucleophilicsubstitution of benzyl alcohols with a variety of carbon- and heteroatom-centered nucleophiles using dodecylbenzenesulfonic acid (DBSA) as a surfactant-type Bronsted acid catalyst in water has been developed. The reaction system can be applied to the stereoselective C-glycosylation of 1-hydroxy sugars in water. [reaction: see text].
Nitrosierungen an Hydrazinderivaten, 9. Mitt.: Neuartige oxidative C-N-Verknüpfungen von Indazolen und Benzotriazolen mit Cycloheptatrien sowie Di- und Triphenylmethanderivaten
作者:Wolfgang Hanefeld、Ingrid Hunz
DOI:10.1002/ardp.19933260604
日期:——
Indazole und Benzotriazole reagieren unter Einwirkung von 2,3‐Dichlor‐5,6‐dicyanbenzochinon (DDQ) mit Verbindungen, die zur Bildung stabilisierter Carbeniumionen neigen, wie Cycloheptatrien, Di‐ und Triphenylmethan, Fluoren, Xanthen und Thioxanthen zu C‐N‐verknüpften Produkten.
DDQ-Catalyzed Direct C(sp<sup>3</sup>)–H Amination of Alkylheteroarenes: Synthesis of Biheteroarenes under Aerobic and Metal-Free Conditions
作者:Chunlan Song、Xin Dong、Hong Yi、Chien-Wei Chiang、Aiwen Lei
DOI:10.1021/acscatal.7b04434
日期:2018.3.2
A strategy for oxidative Csp(3)-H/N-H cross-coupling is presented. This reaction successfully utilizes 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and tert-butyl nitrite (TBN) as co-catalysts to construct the biomedical applicable biheteroarenes under aerobic conditions. Notably, this amination reaction is successful with a wide range of alkylheteroarenes and could be used as a functionalization tactic for pharmaceutical research and other areas. Furthermore, preliminary mechanistic studies indicate that the C-N bond formation proceeds through the nucleophilic attack of azole to the carbon cation.
Claramunt, Rosa M.; Elguero, Jose; Garceran, Rafael, Heterocycles, 1985, vol. 23, # 11, p. 2895 - 2906
作者:Claramunt, Rosa M.、Elguero, Jose、Garceran, Rafael
DOI:——
日期:——
Katritzky, Alan R.; Yang, Baozhen, Journal of Heterocyclic Chemistry, 1996, vol. 33, # 3, p. 607 - 610