efficient sulfinate‐catalyzed intermolecular addition reaction of α‐substituted allenyl sulfones and allenoates with Michaelacceptors is highlighted. The sequence proceeds under mild conditions to provide a scalable and efficient access to versatile functionalized alkynes, displaying a quaternary stereocentre at the propargylic position. This work enriches the diversity of Lewis base organocatalysts
of them showed better antiproliferative efficacy in MCF-7 cell lines with IC50 up to 3.7 μM. In vivo experiments in a MCF-7 breastcancer model in Balb/c nude mice indicated that compound 26a was more potent than tamoxifen. Exploration of the compliancy of the structure against ER specificity utilizing these types of isomeric three-dimensional ligands indicated that one enantiomer had much better biological
Development of Selective Estrogen Receptor Modulator (SERM)-Like Activity Through an Indirect Mechanism of Estrogen Receptor Antagonism: Defining the Binding Mode of 7-Oxabicyclo[2.2.1]hept-5-ene Scaffold Core Ligands
作者:Yangfan Zheng、Manghong Zhu、Sathish Srinivasan、Jerome C. Nwachukwu、Valerie Cavett、Jian Min、Kathryn E. Carlson、Pengcheng Wang、Chune Dong、John A. Katzenellenbogen、Kendall W. Nettles、Hai-Bing Zhou
DOI:10.1002/cmdc.201200048
日期:2012.6
we discovered estrogenreceptor (ER) ligands with a novel three‐dimensional oxabicyclo[2.2.1]heptene corescaffold and good ER binding affinity act as partial agonists via small alkyl ester substitutions on the bicyclic core that indirectlymodulate the critical switch helix in the ER ligandbinding domain, helix 12, by interactions with helix 11. This contrasts with the mechanism of action of tamoxifen