title: Novel One-step Synthesis of Quinoline-2(1H)-thiones and Selones by Treating 3-Aryl-3-(2-aminophenyl)-1-propyn-3-ols with a Base and Elemental Sulfur or Selenium.
abstract: A one-step conversion of 3-aryl-3-(2-aminophenyl)-1-propyn-3-ols into quinoline-2(1H)-thiones and quinoline-2(1H)-selones was achieved only by treating the substrates with n-butyllithium and either elemental sulfur or selenium, respectively. The reactions were assumed to proceed through an intramolecular nucleophilic attack of the neighboring amino group to the plausible in situ generated reactive species related to chalcogenoketenes. The subsequent mCPBA oxidation of quinoline-2(1H)-selones afforded quinolin-2(1H)-ones in high yields.
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Shimada
authors.forename: Hironori
authors.initials: H
authors.lastname: Izumi
authors.forename: Koki
authors.initials: K
authors.lastname: Otashiro
authors.forename: Kensuke
authors.initials: K
authors.lastname: Noro
authors.forename: Shigenobu
authors.initials: S
authors.lastname: Aoyagi
authors.forename: Yuji
authors.initials: Y
authors.lastname: Takikawa
authors.forename: Toshinobu
authors.initials: T
authors.lastname: Korenaga
mesh_terms: D015394:Molecular Structure; D011804:Quinolines / Q000138:chemical synthesis* / Q000737:chemistry; D012643:Selenium / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013871:Thiones / Q000737:chemistry*
chemical_list: D011804:Quinolines; D013871:Thiones; D013455:Sulfur; C037219:quinoline; D012643:Selenium