Expanded scope of heterocyclic biaryl synthesis via a palladium-catalysed thermal decarboxylative cross-coupling reaction
作者:Marie Kissane、Orla A. McNamara、David Mitchell、David M. Coppert、Humphrey A. Moynihan、Kurt T. Lorenz、Anita R. Maguire
DOI:10.1016/j.tetlet.2011.11.051
日期:2012.1
The palladium-catalysed decarboxylativecross-coupling of heterocyclic aromaticcarboxylates and aryl halides is described. The cross-coupling proceeds under relatively mild conditions using catalytic Pd(0) and tetrabutylammonium bromide (TBAB). Utilizing a mixed solvent system consisting of N,N-dimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP), the cross-coupling system operated at temperatures
A Practical Synthesis of Biaryls via a Thermal Decarboxylative Pd-Catalyzed Cross-Coupling Reaction Operating at Moderate Temperature
作者:David Mitchell、David M. Coppert、Humphrey A. Moynihan、Kurt T. Lorenz、Marie Kissane、Orla A. McNamara、Anita R. Maguire
DOI:10.1021/op200030t
日期:2011.9.16
The palladium-catalyzed decarboxylative cross-coupling of aminothiophene carboxylate and 1-bromo-4-chlorobenzene to produce 3-amino-2-(4-chlorophenyl)thiophene (2) is described. The cross-coupling proceeds under relatively mild conditions using catalytic Pd(0) and TBAB. Through use of a mixed-solvent system of DMF and NMP, it was possible to operate the cross-coupling system at 80 degrees C. An assessment of carbon dioxide liberation, which provides insight into the reaction operating parameters, is also discussed.
Substituted thiophene derivative and agricultural and horticultural fungicide containing the same as active ingredient