Synthesis of New 2,3-Dihydroindole Derivatives and Evaluation of Their Melatonin Receptor Binding Affinity
作者:Maria S. Volkova、Alexander M. Efremov、Elena N. Bezsonova、Michael D. Tsymliakov、Anita I. Maksutova、Maria A. Salykina、Sergey E. Sosonyuk、Elena F. Shevtsova、Natalia A. Lozinskaya
DOI:10.3390/molecules27217462
日期:——
3-Dihydroindoles are promising agents for the synthesis of new compounds with neuroprotective and antioxidant properties. Usually, these compounds are obtained by direct reduction of the corresponding indoles containing acceptor groups in the indole ring for its activation. In this work, we propose a synthetic strategy to obtain new 2,3-dihydroindole derivatives from the corresponding polyfunctional 2-oxindoles
synthesis of some2-substituted melatonin derivatives using p-anisidine as starting material is reported. The key step is a chemoselective reduction of a cyano group in the presence of an appropriate acid anhydride by hydrogenation over Adams’ catalyst or with sodium borohydride in the presence of catalytic amounts of anhydrous nickel(II) chloride. The 2-substituted melatonin derivatives were obtained