Catalytic cyclometallation in steroid chemistry III1Steroids 78 (12–13) (2013) 1298–1303 (http://dx.doi.org/10.1016/j.steroids.2013.09.007).1: Synthesis of steroidal derivatives of 5Z,9Z-dienoic acid and investigation of its human topoisomerase I inhibitory activity
作者:Vladimir A. D’yakonov、Lilya U. Dzhemileva、Regina A. Tuktarova、Aleksey A. Makarov、Ilgiz I. Islamov、Alfiya R. Mulyukova、Usein M. Dzhemilev
DOI:10.1016/j.steroids.2015.08.006
日期:2015.10
Two approaches to stereoselective synthesis of steroid 5Z,9Z-dienoic acids were developed, the first one being based on the cross-cyclomagnesiation of 2-(hepta-5,6-dien-1-yloxy)tetrahydro-2H-pyran and 1,2-diene cholesterol derivatives on treatment with EtMgBr catalyzed by Cp2TiCl2, while the other involving the synthesis of esters of hydroxy steroids with (5Z,9Z)-tetradeca-5,9-dienedioic acid, prepared in two steps using homo-cyclomagnesiation of 2-(hepta-5,6-dien-1-yloxy)tetrahydro-2H-pyran as the key step. High inhibitory activity of the synthesized acids against human topoisomerase I (hTop1) was found. (C) 2015 Published by Elsevier Inc.