Thermal Aza-Bergman Cyclization of<i>o</i>-Alkynylaryl Isocyanides with Organic Diselenide, Ditelluride, and Iodine Leading to 2,4-Difunctionalized Quinolines
作者:Takenori Mitamura、Akiya Ogawa
DOI:10.1246/bcsj.20110041
日期:2011.7.15
Thermal aza-Bergman cyclization of o-alkynylaryl isocyanides has been achieved in the presence of organic dichalcogenides. The reactions can be induced upon heating at 40 °C to afford the corresponding 2,4-dichalcogenated quinolines. In addition, similar conditions can be also employed with iodine to form 2,4-diiodoquinolines.
(PhTe)<sub>2</sub>-Mediated Intramolecular Radical Cyclization of <i>o</i>-Ethynylaryl Isocyanides Leading to Bistellurated Quinolines upon Visible-Light Irradiation
作者:Takenori Mitamura、Kimiyo Iwata、Akiya Ogawa
DOI:10.1021/ol901267h
日期:2009.8.6
Upon treatment with (PhTe)(2) under visible-light irradiation, o-ethynylaryl isocyanides underwent intramolecular radical cyclization with introduction of telluro groups, affording the corresponding bistellurated quinolines.