Synlett 2003(5): 0585-0597
DOI: 10.1055/s-2003-38382
ACCOUNT
© Georg Thieme Verlag Stuttgart ˙ New York

Palladium-Catalyzed Intramolecular Arylation Reaction: Mechanism and Application for the Synthesis of Polyarenes

Antonio M. Echavarren*a, Berta Gómez-Lorb, Juan J. Gonzáleza, Óscar de Frutosa
a Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Fax: +34(913)973966; e-Mail: anton.echavarren@uam.es;
b Instituto de Ciencia de Materiales, CSIC, Cantoblanco, 28049, Madrid, Spain
Further Information

Publication History

Received 1 March 2002
Publication Date:
28 March 2003 (online)

Abstract

The intramolecular palladium-catalyzed reaction of aryl bromides and triflates with arenes has been used for the preparation of polyarenes. The synthesis of benz[e]acephenantrylenes, corannulenes, and C60H30, a ‘crushed fullerene’, by using this methodology are presented. Mechanistic studies on the arylation step point to an electrophilic substitution reaction pathway.

  • 1 Introduction

  • 2 An Approach to the Synthesis of Fullerene Fragments based on the Palladium-Catalyzed Arylation

  • 3 Synthesis of Benz[e]acephenantrylenes and Related
    Polyarenes by Palladium-Catalyzed Arylation

  • 4 An Approach to the Synthesis of Dibenzocorannulene

  • 5 Mechanistic Insights into the Palladium-Catalyzed
    Arylation Reaction

  • 5.1 The Role of Phosphine Ligands

  • 5.2 Electrophilic Substitution or C-H Activation?

  • 6 Palladium Catalyzed Arylation Synthesis of C 3 h Polyarenes from Truxenes

  • 7 Summary and Outlook

31

Nogales A. UAM unpublished results Universidad Autónoma de Madrid 1999

35

The analogous reaction of (E,E)-1,4-diphenylbutadiene with acenaphtylene(28) in 1,2-dichlorobenzene at 180 °C afforded a 2:1 mixture of endo and exo cycloadducts in 40% yield. The assignment of the configuration of the major compound as the endo isomer was tentatively based on the 1H NMR data.