期刊
ASIAN JOURNAL OF ORGANIC CHEMISTRY
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ajoc.202300204
关键词
asymmetric catalysis; Friedel-Crafts-type reaction; enantioselectivity; indolin-3-ones; tetrahydrofuroindoles
In this study, the organocatalytic asymmetric aza-Friedel-Crafts-type reaction of indol-3-ones with 1- and 2-naphthols was performed using spirocyclic chiral phosphoric acids and quinine-incorporated squaramides as the organocatalysts. Two classes of structurally distinct chiral compounds, namely 2-(hydroxylnaphthyl)-indolin-3-ones and tetrahydrofuroindoles, were formed. These quaternary centre-containing indoline derivatives may have applications in the synthesis of biologically active molecules.
Indol-3-ones are readily available reaction substrates, but their utility in asymmetric reactions is underdeveloped. Herein, we describe the organocatalytic asymmetric aza-Friedel-Crafts-type reaction of indol-3-ones with 1- and 2-naphthols. By using spirocyclic chiral phosphoric acids and quinine-incorporated squaramides as the organocatalysts, two classes of structurally distinct chiral compounds, namely 2-(hydroxylnaphthyl)-indolin-3-ones and tetrahydrofuroindoles, are formed respectively. These quaternary centre-containing indoline derivatives may find use in the synthesis of biologically active molecules.
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