[EN] COUMARIN COMPOUNDS AS RECEPTOR MODULATORS WITH THERAPEUTIC UTILITY [FR] COMPOSÉS COUMARINE EN TANT QUE MODULATEURS DE RÉCEPTEURS POSSÉDANT UNE UTILITÉ THÉRAPEUTIQUE
[EN] COUMARIN COMPOUNDS AS RECEPTOR MODULATORS WITH THERAPEUTIC UTILITY [FR] COMPOSÉS COUMARINE EN TANT QUE MODULATEURS DE RÉCEPTEURS POSSÉDANT UNE UTILITÉ THÉRAPEUTIQUE
Improved Auxiliary for the Synthesis of Medium-Sized Bis(lactams)
作者:Jasper Springer、T. Paul Jansen、Steen Ingemann、Henk Hiemstra、Jan H. van Maarseveen
DOI:10.1002/ejoc.200700832
日期:2008.1
Our auxiliary-based method for the synthesis of bis(lactams) has been optimized. A novel auxiliary is described that is inserted in the backbone of a linear peptide facilitating the mutually reactive terminal groups to approach one another for a cyclization reaction. A subsequent ring contraction mechanism leads to the bis(lactams) with the remainings of the auxiliary still attached. Functionalized seven-
Regio- and Stereospecific Synthesis of Mono-β-<scp>d</scp>-Glucuronic Acid Derivatives of Combretastatin A-1
作者:Rajendra P. Tanpure、Tracy E. Strecker、David J. Chaplin、Bronwyn G. Siim、Mary Lynn Trawick、Kevin G. Pinney
DOI:10.1021/np100108e
日期:2010.6.25
Synthetic routes have been established for the preparation of regio- and stereoisomerically pure samples of the mono-beta-D-glucuronic acid derivatives of combretastatin A-1, referred to as CA1G1 (5a) and CA1G2 (6a). Judicious choice of protecting groups for the catechol ring was required for the regiospecific introduction of the glucuronic acid moiety. The tosyl group proved advantageous in this regard. The two monoglucuronic acid analogues demonstrate low cytotoxicity (compared to CA1, 2) against selected human cancer cell lines, with CA1G1 being slightly more potent than CA1G2.
[EN] COUMARIN COMPOUNDS AS RECEPTOR MODULATORS WITH THERAPEUTIC UTILITY<br/>[FR] COMPOSÉS COUMARINE EN TANT QUE MODULATEURS DE RÉCEPTEURS POSSÉDANT UNE UTILITÉ THÉRAPEUTIQUE