The 2,4-dinitrophenylation of thiol or amino group with 1,2,4-trinitrobenzene proceeded quantitatively at pH 8.5 and 30 °C. The rate of S-dinitrophenylation was ≈104 times faster than that of N-dinitrophenylation. So this reaction can be used for both the determination of thiol even in the presence of large excess amine and the specific modification of thiol in proteins.
硫醇或氨基与 1,2,4-三硝基苯的 2,4-二硝基苯基化反应在 pH 8.5 和 30 °C 下定量进行。 S-二硝基苯基化的速率比N-二硝基苯基化的速率快约104倍。因此,该反应既可用于在存在大量过量胺的情况下测定硫醇,又可用于蛋白质中硫醇的特异性修饰。
Preparation and Properties of 2,4-Dinitrophenyl-L-amino Acids
作者:Krishnarau R. Rao、Herbert A. Sober
DOI:10.1021/ja01634a041
日期:1954.3
Scanes; Tozer, Biochemical Journal, 1956, vol. 63, p. 282,288