their catalytic potential in acylation reactions of alcohols. The ability of the substitution pattern to stabilize acylpyridinium cations, which act as critical intermediates in the catalytic cycle of pyridine-catalyzed acylation reactions, has been assessed at the MP2(FC)/6-31+G(2d,p)//B98/6-31G(d) level of theory and inclusion of solvent effects in chloroform using the PCM continuum solvation model
Annelated Pyridines as Highly Nucleophilic and Lewis Basic Catalysts for Acylation Reactions
作者:Raman Tandon、Teresa Unzner、Tobias A. Nigst、Nicolas De Rycke、Peter Mayer、Bernd Wendt、Olivier R. P. David、Hendrik Zipse
DOI:10.1002/chem.201204452
日期:2013.5.10
their nucleophilicity and Lewisbasicity. The Lewisbasicity of these bases as quantified through their theoretically calculated methyl‐cation affinities correlate well with the experimentally measured reaction rates for addition to benzhydryl cations. All newly synthesized pyridines show exceptional catalytic activities in benchmark acylationreactions, which correlate only poorly with Lewis basicity