and consequently a number of compounds from this series demonstrated single-digit nanomolar 17β-HDS3 inhibitory activity in vitro. Subsequent optimization work in pursuit of the improvement of oral bioavailability demonstrated in vivo proof-of-concept by prodrug strategy based on phosphate esters for these 17β-HSD3 inhibitors. When a phosphate ester 16 was administered orally at a high dose of 100 mg/kg
Functionalized benzophenone, thiophene, pyridine, and fluorene thiosemicarbazone derivatives as inhibitors of cathepsin L
作者:G.D. Kishore Kumar、Gustavo E. Chavarria、Amanda K. Charlton-Sevcik、Grace Kim Yoo、Jiangli Song、Tracy E. Strecker、Bronwyn G. Siim、David J. Chaplin、Mary Lynn Trawick、Kevin G. Pinney
DOI:10.1016/j.bmcl.2010.09.026
日期:2010.11
of thiosemicarbazone analogs based on the benzophenone, thiophene, pyridine, and fluorene molecular frameworks has been prepared by chemical synthesis and evaluated as small-molecule inhibitors of the cysteine proteases cathepsin L and cathepsinB. The two most potent inhibitors of cathepsin L in this series (IC50 <135 nM) are brominated-benzophenone thiosemicarbazone analogs that are further functionalized
Schiff-base [4]helicene Zn(<scp>ii</scp>) complexes as chiral emitters
作者:Mariia Savchuk、Steven Vertueux、Thomas Cauchy、Matthieu Loumaigne、Francesco Zinna、Lorenzo Di Bari、Nicolas Zigon、Narcis Avarvari
DOI:10.1039/d1dt01752g
日期:——
surrounded by [4]helicene moieties, together with their racemic counterpart 3, have been herein synthesized. Chirality is primarily brought about by chiral 1,2-cyclohexane-diamines. Alternatively, achiral complex 4 based on ortho-phenylene-diamine has been prepared as well. Single crystal X-ray diffraction analyses have been performed on helicenic intermediates 8 and 9 and complexes 1 and 4. Complexes
手性发光过渡金属配合物的可控制备是圆偏振发光(CPL)活性分子材料领域的基础。为此,本文合成了基于被 [4] 螺旋部分包围的四齿萨伦配体的对映体纯 Zn( II ) 配合物1和2,连同它们的外消旋对应物3。手性主要由手性 1,2-环己烷二胺产生。或者,也制备了基于邻苯二胺的非手性配合物4。已对螺旋中间体8和9进行单晶 X 射线衍射分析和复合物1和4。配合物1和4显示出典型的四齿O、N、N、O配位围绕 Zn( II ) 配体的特征,并带有两个 [4] 螺旋烯部分。锌配合物在室温下在充气溶液中在约 560 nm 的可见光范围内发光,QY 达到约 15% 的发光寿命为 5.5 ns。这些配合物的光学活性已通过 CD 和 CPL 进行评估,并与 DFT 计算进行比较。
LIGANDS FOR IMAGING CARDIAC INNERVATION
申请人:Lantheus Medical Imaging, Inc.
公开号:US20140030189A1
公开(公告)日:2014-01-30
Novel compounds that find use as imaging agents within nuclear medicine applications (PET imaging) for imaging of cardiac innervation are disclosed. These PET based radiotracers may exhibit increased stability, decreased NE release (thereby reducing side effects), improved quantitative data, and/or high affinity for VMAT over prior radiotracers. Methods of using the compounds to image cardiac innervation are also provided. In some instances the compounds are developed by derivatizing certain compounds with 18F in a variety of positions: aryl, alkyl, a keto, benzylic, beta-alkylethers, gamma-propylalkylethers and beta-proplylalkylethers. Alternatively or additionally, a methyl group a is added to the amine, and/or the catechol functionality is either eliminated or masked as a way of making these compounds more stable.
Synthesis of Substituted Cyclooctenes through Cross-Coupling Reactions
作者:Daisuke Uraguchi、Keisuke Asano、Ryuichi Murata、Rakuto Yoshida
DOI:10.1055/a-2330-0819
日期:2025.1
Cross-coupling methods for the introduction of various substituents onto the olefin moiety of cyclooctenes were developed. A range of 1-substituted cis-cyclooctenes were synthesized. These protocols unlocked routes to previously inaccessible derivatives, permitting the syntheses of cis-cyclooctenes bearing various functional groups. Moreover, the method was applied to the synthesis of a 1,2-disubstituted