Synthesis 2022; 54(03): 741-753
DOI: 10.1055/s-0041-1737275
paper

Synthesis of Indole/Benzofuran-Containing Diarylmethanes through Palladium-Catalyzed Reaction of Indolylmethyl or Benzofuranylmethyl Acetates with Boronic Acids

Antonio Arcadi
a   Dipartimento di Ingegneria e Scienze dell’Informazione e Matematica, Università degli studi di L’ Aquila, Via Vetoio, 67100 Coppito (AQ), Italy
b   Dipartimento di Scienze Fisiche e Chimiche, Università degli studi di L’ Aquila, Via Vetoio, 67100 Coppito (AQ), Italy
,
Andrea Calcaterra
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
,
Marco Chiarini
d   Università degli Studi di Teramo, Facoltà di Bioscienze e tecnologie agro-alimentari e ambientali, via R. Balzarini, 1 - 64100 Teramo, Italy
,
Giancarlo Fabrizi
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
,
Andrea Fochetti
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
,
Antonella Goggiamani
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
,
e   Dipartimento di Scienze Biotecnologiche di base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, L.go Francesco Vito 1, 00168 Rome, Italy
,
Federico Marrone
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
,
Vincenzo Marsicano
b   Dipartimento di Scienze Fisiche e Chimiche, Università degli studi di L’ Aquila, Via Vetoio, 67100 Coppito (AQ), Italy
,
Andrea Serraiocco
c   Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
› Author Affiliations
Projects of national interest (Progetti di Ricerca di Interesse Nazionale - PRIN 2017SXBSX4) project 2017 ‘Targeting Hedgehog pathway: virtual screening identification and sustainable synthesis of novel Smo and Gli inhibitors and their pharmacological drug delivery strategies for improved therapeutic effects in tumors.’


Abstract

The palladium-catalyzed synthesis of indole/benzofuran-containing diarylmethanes starting from indolylmethyl or benzofuranylmethyl acetates with boronic acids has been investigated. The success of the reaction is influenced by the choice of precatalyst: with indolylmethyl acetates the reaction works well with [Pd(η3-C3H5)Cl]2/XPhos while with benzofuranylmethyl acetates Pd2(dba)3/XPhos is more efficient. The good to high yields and the simplicity of the experimental procedure make this protocol a versatile synthetic tool for the preparation of 2- and 3-substituted indoles and 2-benzo[b]furans. The methodology can be advantageously extended to the preparation of a key precursor of Zafirlukast.

Supporting Information



Publication History

Received: 15 August 2021

Accepted after revision: 07 October 2021

Article published online:
11 November 2021

© 2021. Thieme. All rights reserved

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