Synthesis and Characterization of Novel Quinone Methides: Reference Electrophiles for the Construction of Nucleophilicity Scales
作者:Dorothea Richter、Nathalie Hampel、Thomas Singer、Armin R. Ofial、Herbert Mayr
DOI:10.1002/ejoc.200900299
日期:2009.7
acceptor substituted quinonemethides 2e–g. The second-order rate constants for the reactions of 3c–f and 2e–g with the carbanions 9a–h were determined photometrically in DMSO. With Equation (1), log k2 = s (N + E), and the known nucleophilicity parameters N and s for the carbanions 9a–h, it was possible to calculate the electrophilicity parameters E for these quinonemethides. With E parameters between