Cobalt-Catalyzed Direct C-H Carbonylative Synthesis of Free (NH)-Indolo[1,2-a]quinoxalin-6(5H)-ones.
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DOI: 10.1021/acs.orglett.0c03900
Abstract: A cobalt-catalyzed direct C-H carbonylative reaction of N-(2-(1H-indol-1-yl)phenyl)picolinamides for the synthesis of (NH)-indolo[1,2-a]quinoxalin-6(5H)-one skeletons has been developed. Using benzene-1,3,5-triyl triformate (TFBen) as the CO source and picolinamide as the traceless directing group, various free (NH)-indolo[1,2-a]quinoxalin-6(5H)-ones… read more here.
Keywords: indolo quinoxalin; free indolo; cobalt catalyzed; catalyzed direct ... See more keywords
Chemoselective N-H or C-2 Arylation of Indole-2-carboxamides: Controllable Synthesis of Indolo[1,2- a]quinoxalin-6-ones and 2,3'-Spirobi[indolin]-2'-ones.
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DOI: 10.1021/acs.orglett.8b02197
Abstract: Novel methods involving the chemoselective N-H or C-2 arylation for the synthesis of indolo[1,2- a]quinoxalin-6-ones and 2,3'-spirobi[indolin]-2'-ones starting from indole-2-carboxamides were developed. When reactions were carried out using ZnI2 as catalyst and Ag2CO3 as oxidant,… read more here.
Keywords: quinoxalin ones; indolo quinoxalin; spirobi indolin; indolin ones ... See more keywords