Basicities and Nucleophilicities of Pyrrolidines and Imidazolidinones Used as Organocatalysts
作者:Feng An、Biplab Maji、Elizabeth Min、Armin R. Ofial、Herbert Mayr
DOI:10.1021/jacs.9b11877
日期:2020.1.22
the attack of the amines at the electrophiles to be determined. The resulting second-order rate constants k2 followed the correlation log k2(20 °C) = sN(N + E), where electrophiles are characterized by one parameter (E) and nucleophiles are characterized by the two solvent-dependent parameters N and sN. In this way, the organocatalysts A1-A32 were integrated in our comprehensive nucleophilicity scale