期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 362, 期 16, 页码 3416-3422出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.202000491
关键词
Benzannulation; Benzo[b]carbazoles; Chemoselectivity; Isochromenes; oxo-Cyclization
资金
- NSFC [21871112, 21971090]
Tunable catalytic annulation reactions of beta alkynyl ketones with indoles have been developed, enabling multiple chemical bond-forming events to selectively access skeletally diverse indole-containing heterocycles with generally good yields. Silver-catalyzed intermolecular benzannulation reaction of beta-alkynyl ketones with indoles afforded tetracyclic benzo[b]carbazoles whereas isochromen-1-yl-substituted indoles could be obtained using the same silver catalysis by lowering the reaction temperature (0 degrees C or rt). Interestingly, using Sc(OTf)(3)and AgOTf as a combined catalytic system led to the formation of C3-naphthylated indolesviaintramolecular benzannulation reaction.
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