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DOI: 10.1055/s-2005-869980
Pd(OAc)2/DABCO as a Highly Active Catalytic System for the Heck Reaction
Publication History
Publication Date:
24 June 2005 (online)

Abstract
The combination of Pd(OAc)2 and DABCO (triethylenediamine) was observed as an efficient catalytic system for the Heck cross-coupling reaction. In the presence of Pd(OAc)2 and DABCO, a number of ArX (X = I, Br, and Cl) were coupled with olefins efficiently and selectively to afford the corresponding unsymmetric internal olefins in good to excellent yields. Furthermore, the Pd(OAc)2/DABCO-catalyzed Heck cross-coupling reaction provided high TONs up to 1,000,000.
Key words
Pd(dba)2/DABCO - Heck cross-coupling reaction - aryl halide - olefin - turnover number
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Three roles of TBAB might play in the reaction: (i)activation of Pd(0) species with the formation of anionic species;(ii) stabilization of low co-ordination Pd(0) species;(iii) phase-transfer catalyst for the inorganic base/solvent/substrates/product phases. See references 5h, 6b, and 9.