Synlett 2020; 31(18): 1775-1788
DOI: 10.1055/s-0040-1707152
account
© Georg Thieme Verlag Stuttgart · New York

Dearomatization Reactions of Indoles to Access 3D Indoline Structures

Hussein Abou-Hamdan
,
Cyrille Kouklovsky
,

The research leading to the results summarized in this account has received funding from the ANR (ANR-17-CE07-0050 “ArDCo” and ANR-12-JS07-0002 “CouPhIn), the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement n° 623422 (“ElectrIndole”), Labex CHARMMMAT (ANR-11-LABX-0039), the China­ Scholarship Council, the “Ministère de l’Enseignement Supérieur, de la Recherche et de l’Innovation, the Université Paris-Sud and the CNRS.
Further Information

Publication History

Received: 26 April 2020

Accepted after revision: 23 May 2020

Publication Date:
24 June 2020 (online)


Abstract

This Account summarizes our involvement in the development of dearomatization reactions of indoles that has for origin a total synthesis problematic. We present the effort from our group to obtain 3D-indolines scaffold from the umpolung of N-acyl indoles via activation with FeCl3 to the oxidative spirocyclizations of N-EWG indoles and via the use of electrochemistry.

1 Introduction

2 Activation of N-Acyl Indoles with FeCl3

2.1 Hydroarylation of N-Acyl Indoles

2.2 Difunctionalization of N-Acyl Indoles

3 Radical-Mediated Dearomatization of Indoles for the Synthesis of Spirocyclic Indolines

4 Electrochemical Dearomatization of Indoles

4.1 Direct Electrochemical Oxidation of Indoles

4.2 Indirect Electrochemical Oxidation of Indoles

5 Conclusion

 
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