From Ketenimines to Ketenes to Quinolones: Two Consecutive Pseudopericyclic Events

2006 Quinoline derivatives R 0410 From Ketenimines to Ketenes to Quinolones: Two Consecutive Pseudopericyclic — Thermally induced cyclization of ketenimines causes a facile [1,5] sigma13- 149 Events. tropic migration of the alkyl(aryl)thio group and subsequent 6π- electrocyclic ring closure to afford 2-alkyl(aryl)thio-3H-quinolin-4-ones. — (ALAJARIN*, M.; ORTIN, M.-M.; SANCHEZ-ANDRADA, P.; VIDAL, A.; BAUTISTA, D.; Org. Lett. 7 (2005) 23, 5281-5284; Dep. Quim. Org., Fac. Quim., Univ. Murcia, E-30071 Murcia, Spain; Eng.) — R. Steudel