Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (1): 24-32.DOI: 10.1016/S1872-2067(14)60201-1

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Pd-catalyzed cyclodimerization of alkenyl and aryl dibromides: Construction of dibenzo[a,e]cyclooctatetraenes

Kunbing Ouyanga,b, Zhenfeng Xib   

  1. a Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    b Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
  • Received:2014-06-30 Revised:2014-07-21 Online:2014-12-31 Published:2014-12-31
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2012CB821600) and the National Natural Science Foundation of China (21132001).

Abstract:

Cyclooctatetraenes, including dibenzocyclooctatetraenes, are structurally interesting compounds and are widely used in many areas. Therefore, the development of synthetic methods for such compounds has long been attractive. In this work, a Pd-catalyzed coupling reaction between alkenylbromides and arylbromides has been realized. Multi-substituted 1,4-dibromo-1,3-butadienes and o-bromo-2-(2-bromovinyl)benzenes underwent a Pd-catalyzed cyclodimerization reaction to afford the corresponding multi-substituted cyclooctatetraenes and dibenzo[a,e] cyclooctatetraenes, respectively, in high yields and with excellent regioselectivity.

Key words: Dibromide, Cyclooctatetraene, Dibenzo[a,e]cyclooctatetraene, 1,4-Dibromo-1,3-butadiene, Homo-coupling, Palladium catalyst