Synthesis of 3-[(N-carboalkoxy)ethylamino]-indazole-dione derivatives and their biological activities on human liver carbonyl reductase
作者:Solomon Berhe、Andrew Slupe、Choice Luster、Henry A. Charlier、Don L. Warner、Leon H. Zalkow、Edward M. Burgess、Nkechi M. Enwerem、Oladapo Bakare
DOI:10.1016/j.bmc.2009.11.011
日期:2010.1
A series of indazole-dione derivatives were synthesized by the 1,3-dipolar cycloaddition reaction of appropriate substituted benzoquinones or naphthoquinones and N-carboalkoxyamino diazopropane derivatives. These compounds were evaluated for their effects on human carbonyl reductase. Several of the analogs were found to serve as substrates for carbonyl reductase with a wide range of catalytic efficiencies, while four analogs display inhibitory activities with IC50 values ranging from 3-5 mu M. Two of the inhibitors were studied in greater detail and were found to be noncompetitive inhibitors against both NADPH and menadione with K-I values ranging between 2 and 11 mu M. Computational studies suggest that conformation of the compounds may determine whether the indazole-diones bind productively to yield product or nonproductively to inhibit the enzyme. (C) 2009 Elsevier Ltd. All rights reserved.