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.
Nucleophilic Substitution of Benzotriazolylalkyl Chlorides with Grignard Reagents: A Direct Route to Benzotriazoloalkyl(hetero)aromatic Compounds
作者:Alan R. Katritzky
DOI:10.1055/s-1999-3662
日期:1999.8
Benzotriazole-Assisted Aromatic Ring Annulation: Efficient and General Syntheses of Polysubstituted Naphthalenes and Phenanthrenes
作者:Alan R. Katritzky、Guifen Zhang、Linghong Xie
DOI:10.1021/jo961597x
日期:1997.2.1
4-addition to alpha,beta-unsaturated aldehydes and ketones. Intramolecular cyclization of the products, induced by acetic acid-hydrobromic acid or polyphosphoric acid (PPA), followed by simultaneous dehydration and debenzotriazolylation furnishes a wide range of polysubstituted naphthalenes 7a-f and of phenanthrenes 9 and 11 in moderate to good yields in one-pot procedures. If compounds 1 are first lithiated