Palladium-Catalyzed Synthesis of Indoles and Isoquinolines with <i>in Situ</i> Generated Phosphinimine
作者:Qi Zhou、Zhikun Zhang、Yujing Zhou、Shichao Li、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.6b01864
日期:2017.1.6
A palladium-catalyzed synthesis of polysubstituted indoles and isoquinolines through the coupling of aryl bromides with 2-alkynyl arylazides or 2-alkynyl benzylazides has been developed. This method provides straightforward access to indoles and isoquinolines with high efficiency and excellent functional group compatibility. In this transformation, the iminophosphorane in situ generated from azides
Iodine-Mediated Electrophilic Cyclization of 2-Alkynyl-1-methylene Azide Aromatics Leading to Highly Substituted Isoquinolines and Its Application to the Synthesis of Norchelerythrine
作者:Dirk Fischer、Hisamitsu Tomeba、Nirmal K. Pahadi、Nitin T. Patil、Zhibao Huo、Yoshinori Yamamoto
DOI:10.1021/ja805326f
日期:2008.11.19
corresponding isoquinoline derivatives in excellent to allowable yields. Electron-donating and electron-accepting substituents on the aromatic ring were equally tolerated, and either acidic or basic (or even neutral) reaction conditions, depending on the reactivity of the substrate, could be applied to smoothly convert the azide starting materials into the desired isoquinoline products in moderate to good yields
practical Tf2O-catalyzed tandem cyclization/trifluoromethylselenolation of alkynes with EtOH as the green solvent was developed. Various CF3Se-containing heterocycliccompounds, including indoles, benzofurans, benzothiophenes, isoquinolines and chromenes have been synthesized with trifluoromethyl selenoxides as CF3Se source.
Synthesis of 1,3,4-Trisubstituted Isoquinolines by Iodine-Mediated Electrophilic Cyclization of 2-Alkynyl Benzyl Azides
作者:Dirk Fischer、Hisamitsu Tomeba、Nirmal K. Pahadi、Nitin T. Patil、Yoshinori Yamamoto
DOI:10.1002/anie.200701392
日期:2007.6.18
Gold-catalyzed synthesis of isoquinolines via intramolecular cyclization of 2-alkynyl benzyl azides
作者:Zhibao Huo、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2009.03.129
日期:2009.7
Intramolecular cyclization of 2-alkynylbenzylazides in the presence of AuCl3 and AgSbF6 in THF under a pressured vial at 100 °C gives the corresponding isoquinolines in good yields. Similarly, the five-membered analogs afford the corresponding isoquinolines.