2-Substituted 3-arylindoles through palladium-catalyzed arylative cyclization of 2-alkynyltrifluoroacetanilides with arylboronic acids under oxidative conditions
Free NH 2-substituted 3-arylindoles have been prepared usually in good to high yields through the palladium-catalyzed reaction of readily available 2-alkynyltrifluoroacetanilides with arylboronic acids under oxidative conditions. The reaction tolerates a variety of useful functional groups both in the arylboronic acid and in the alkyne, including chloro, formyl, and ester groups.
2-Substituted 3-Aryl- and 3-Heteroarylindoles by the Palladium-Catalyzed Reaction of<i>o</i>-Trifluoroacetanilides with Aryl Bromides and Triflates.
作者:Sandro Cacchi、Giancarlo Fabrizi、Doriano Lamba、Fabio Marinelli、Luca M. Parisi
DOI:10.1055/s-2003-38079
日期:——
The palladium-catalyzed reaction of aryl and heteroaryl bromides and triflates with o-alkynyltrifluoroacetanilides affords 2-substituted 3-aryl- and heteroarylindoles usually in excellent yield. The procedure can be applied to the synthesis of 2-substituted indole-3-carboxaldehydes.
Cycloisomerization of 2-Alkynylanilines to Indoles Catalyzed by Carbon-Supported Gold Nanoparticles and Subsequent Homocoupling to 3,3′-Biindoles
作者:Jesus E. Perea-Buceta、Tom Wirtanen、Otto-Ville Laukkanen、Mikko K. Mäkelä、Martin Nieger、Michele Melchionna、Nina Huittinen、Jose A. Lopez-Sanchez、Juho Helaja
DOI:10.1002/anie.201305579
日期:2013.11.4
Elevated by the support: 2‐Alkynyl aniline cycloisomerization to indole is catalyzed by cationic Au NPs on a carbon support. Electroneutral and rich 2‐aryl indoles are further converted into 3,3′‐biindoles by oxidative homocoupling that is readily catalyzed by the Au NPs on carbon, and exclusively but also somewhat sluggishly by the carbon support.
Carbocatalysed Oxidative C sp 2C sp 2 Homocouplings of Benzo-Fused Heterocycles
作者:Tom Wirtanen、Mikko K. Mäkelä、Jawad Sarfraz、Petri Ihalainen、Sami Hietala、Michele Melchionna、Juho Helaja
DOI:10.1002/adsc.201500664
日期:2015.11.16
2′- and 3,3′-homocouplings of various functionalised indoles with outstanding activity. This newly developed carbocatalysed CC bond formation can be achieved under mild thermal conditions. The study on the scope of the reaction revealed that the reaction can be extended to the homocoupling of other substrates of high synthetic interest such as 2-naphthol, 2-functionalised benzofurans and benzothiofurans
Ferrocenyl induced one-pot synthesis of 3,3′-ferrocenylbiindoles
作者:Ligang Yan、Limin Han、Ruijun Xie
DOI:10.1080/00958972.2020.1770235
日期:2020.4.17
Abstract When we used 2-ferrocenethynylaniline (1a) as reactant and NaAuCl4·2H2O (5%) as catalyst to prepare 2-ferrocenylindole (2a), we were surprised to find that 3,3′-ferrocenylbiindole (3a) was obtained simultaneously. 3a was characterized by elemental analysis, FT-IR, MS, NMR, and X-ray single crystal diffraction. The reactant substitution reaction, in-situ HNMR, XPS, EPR characterization, and