Synthesis of 15-methylene-eburnamonine from (+)-vincamine, evaluation of anticancer activity, and investigation of mechanism of action by quantitative NMR
作者:James R. Woods、Mark V. Riofski、Mary M. Zheng、Melissa A. O’Banion、Huaping Mo、Julia Kirshner、David A. Colby
DOI:10.1016/j.bmcl.2013.08.095
日期:2013.11
The biological role of installing a critical exocyclic enone into the structure of the alkaloid, (-)-eburnamonine, and characterization of the new chemical reactivity by quantitative NMR without using deuterated solvents are described. This selective modification to a natural product imparts potent anticancer activity as well as bestows chemical reactivity toward nucleophilic thiols, which was measured by quantitative NMR. The synthetic strategy provides an overall conversion of 40%. In the key synthetic step, a modified Peterson olefination was accomplished through the facile release of trifluoroacetate to create the requisite enone in the presence of substantial steric hindrance. (C) 2013 Elsevier Ltd. All rights reserved.