Total synthesis of a key series of vinblastines modified at C4 that define the importance and surprising trends in activity
作者:Shouliang Yang、Kuppusamy Sankar、Colin K. Skepper、Timothy J. Barker、John C. Lukesh III、Daniel M. Brody、Manuela M. Brütsch、Dale L. Boger
DOI:10.1039/c6sc04146a
日期:——
electron-deficient 1,3,4-oxadiazoles. Such cycloaddition cascades were used to directly introduce altered C4 substituents, providing the basis for concise total syntheses of a series of C4 modified vindolines and their subsequent single-step incorporation into the corresponding synthetic vinblastines in routes as short as 8–12 steps. Evaluation of the synthetic vinblastines revealed a surprisingly large
Synthesis and Biological Evaluation of Vinca Alkaloids and Phomopsin Hybrids
作者:Quoc Anh Ngo、Fanny Roussi、Anthony Cormier、Sylviane Thoret、Marcel Knossow、Daniel Guénard、Françoise Guéritte
DOI:10.1021/jm801064y
日期:2009.1.8
Ten hybrids of vinca alkaloids and phomopsin A have been synthesized by linking the octahydrophomopsin lateral chain to the tertiary amine of the cleavamine moiety of anhydrovinblastine (AVLB) and vinorelbine. These compounds have been elaborated in order to obtain original products that may interfere with both binding sites of vinblastine (VLB) and phomopsin in tubulin. Although NMR and molecular modeling studies have shown that the orientation of the added peptide chains of these hybrids is not the same as those of phomopsin A, most of them are very potent inhibitors of microtubules assembly and they present good cytotoxicity against KB cell line. These interesting biological activities may eventually be explained by the fact that their lateral chain resides in a pocket distinct from that of the phomopsin A peptide, at the interface of tubulins beta and alpha.