The molecular design, characteristics, and catalytic activity of macrocyclic amino compounds, azacalix[3](2,6)pyridine derivatives, were studied. The introduction of an electron-donating group on the pyridine moiety and bridging amino phenyl group enabled the enhancement of the basicity of azacalix[3](2,6)pyridine up to pK(BH+) = 29.5 in CD3CN. These derivatives were shown to be efficient catalysts for 1,4-addition reactions of nitroalkanes or primary alcohols to alpha,beta-unsaturated carbonyl compounds and 1,2-addition reactions of nitroalkanes to aromatic aldehydes.
Tse-Tang, Man Wing; Gaffney, Betty Jean; Kelly, Robert E., Heterocycles, 1981, vol. 15, # 2, p. 965 - 974
作者:Tse-Tang, Man Wing、Gaffney, Betty Jean、Kelly, Robert E.