Characterization of the 2-(α-Carbolinyl)nitrenium Ion and Its Conjugate Base Produced during the Decomposition of the Model Carcinogen 2-<i>N</i>-(Pivaloyloxy)-2-amino-α-carboline in Aqueous Solution
作者:Michael Novak、Shahrokh Kazerani
DOI:10.1021/ja993433e
日期:2000.4.1
The kinetics of the decomposition of the model ultimate carcinogen 2-N-(pivaloyloxy)-2-amino-α-carboline (4a), and its 9-methyl analogue (4b), in 20 vol % CH3CN−H2O, μ = 0.5 (NaClO4) at 20 °C, are consistent with the uncatalyzed N−O bond heterolysis of the neutral esters. The protonated ester 4aH+ (pKa = 1.6), detected kinetically and by spectrophotometric titration, is unreactive under these conditions