
ACS Omega, Год журнала: 2024, Номер 9(45), С. 45501 - 45517
Опубликована: Окт. 29, 2024
A cascade transformation of C2-quaternary indoxyls leading to an efficient assembly complex (dihydro)indolo[1,2-a]quinolin-5-one ring systems is reported. The method involves the gram-scale preparation 2-(2-aryl-3-oxoindolin-2-yl)-2-phenylacetonitriles which are then converted with methyl ketones corresponding 2-(2-oxo-2-aryl(alkyl)ethyl)-2-phenylindolin-3-ones. latter can either be isolated good yields (75–96%) or, in case o-nitroacetophenone, used situ for further base-assisted intramolecular SNAr cyclization resulting indoxyl-fused quinolone-4 hybrids (up 95%).
Язык: Английский