A wide range of 2-Benzylindoles 2 are conveniently and efficiently prepared by heating N-benzylindoles 1 in polyphosphoric acid. Mechanistic studies suggest an intramolecular rearrangement via the corresponding 3-benzyl intermediates.
One-pot synthesis of polysubstituted indoles from aliphatic nitro compounds under mild conditions
作者:Christopher A. Simoneau、Alexis M. Strohl、Bruce Ganem
DOI:10.1016/j.tetlet.2007.01.031
日期:2007.3
Polysubstitutedindoles can be prepared directly from functionalized nitroalkanes under very mildly acidic conditions in a simple, one-pot, two-stage procedure.
多取代吲哚可以在非常温和的酸性条件下通过简单的一锅两步程序直接从官能化硝基烷烃制备。
Rapid and General Protocol towards Catalyst-Free Friedel-Crafts C-Alkylation of Indoles in Water Assisted by Microwave Irradiation
作者:Margherita De Rosa、Annunziata Soriente
DOI:10.1002/ejoc.200901333
日期:2010.2
uncatalyzed Friedel― Crafts alkylation of indoles using microwave irradiation in water is described. A series of functionalized indole derivatives has been synthesized in very short times with moderate to good yields. The combination of microwave irradiation and superheated water offers significant advantages over conventional methods, such as higher selectivities, simplicity, shorter reaction times, and
Synthesis of C<sub>60</sub>-Fused Tetrahydrocarbazole/Dibenzothiophene/Benzothiophene and Dibenzofuran Derivatives via Metal-Free Oxidative Dehydrogenative Carboannulation
A transition-metal-free oxidative dehydrogenative coupling reaction has been developed for the direct construction of novel C60-fused tetrahydrocarbazoles, dibenzothiophenes, benzothiophenes, and dibenzofurans. This new carboannulation reaction features high atom economy, operational simplicity, broad substrate scope, and excellent functional-group tolerance and provides a convenient access to a scarce
Organocatalytic Enantioselective Functionalization of Unactivated Indole C(sp
<sup>3</sup>
)−H Bonds
作者:Dengke Ma、Zhihan Zhang、Min Chen、Zhenyang Lin、Jianwei Sun
DOI:10.1002/anie.201909397
日期:2019.10.28
Described here is a direct catalyticasymmetric functionalization of unactivated alkyl indoles using organocatalysis. In the presence of an effective chiral urea catalyst and a phosphoric acid additive, the intermolecular C-C bond formation between alkyl indoles and trifluoropyruvates proceeded with highefficiency and enantiocontrol. Unlike previous asymmetric C(sp3 -H) functionalizations of α-azaarenes