Preparation of penta-azole containing cyclopeptides: challenges in macrocyclization
作者:Delia Hernández、Estela Riego、Andrés Francesch、Carmen Cuevas、Fernando Albericio、Mercedes Álvarez
DOI:10.1016/j.tet.2007.06.103
日期:2007.9
Herein is described the synthesis of several analogs of the natural product IB-01211 from concatenated azoles, via a biomimetic pathway based on cyclization-oxidation of serine containing peptides combined with the Hantzsch synthesis. The macrocyclization of rigid peptide compounds 1 and 2 to give IB-01211 and its epimer 12b was explored, and the results are compared here to those previously obtained for the macrocyclization of more flexible structures in the syntheses of YM-216391, telomestatin, and IB-01211. Lastly, the preliminary results of anti-tumor activity screening of the synthesized analogs are discussed. (C) 2007 Elsevier Ltd. All rights reserved.