Gold-Catalyzed 5-<i>endo</i>-<i>dig</i>Cyclization of 2-[(2-Aminophenyl)ethynyl]phenylamine with Ketones for the Synthesis of Spiroindolone and Indolo[3,2-<i>c</i>]quinolone Scaffolds
作者:Basi. V. Subba Reddy、Manisha Swain、S. Madhusudana Reddy、J. S. Yadav、B. Sridhar
DOI:10.1002/ejoc.201402006
日期:2014.6
A tandem gold-catalyzed 5-endo-dig/spirocyclization of 2-[(2-aminophenyl)ethynyl]phenylamines with isatins was achieved to produce the corresponding 5′,11′-dihydrospiro[indoline-3,6′-indolo[3,2-c]quinolin]-2-one derivatives in good yields with high regioselectivity. This reaction proceeded well at ambient temperature under mild conditions. Ketones also participated smoothly under similar conditions