<i>Cis</i>–<i>Trans</i> Amide Bond Rotamers in β-Peptoids and Peptoids: Evaluation of Stereoelectronic Effects in Backbone and Side Chains
作者:Jonas S. Laursen、Jens Engel-Andreasen、Peter Fristrup、Pernille Harris、Christian A. Olsen
DOI:10.1021/ja312532x
日期:2013.2.20
we here report an investigation of the effect of structural variations on the cis-trans amide bond rotamer equilibria in a selection of monomer model systems. In addition to various side chain effects, which correlated well with previous studies of α-peptoids, we present the synthesis and investigation of cis-trans isomerism in the firstexamples of peptoids and β-peptoids containing thioamide bonds
Aminosilanes as two-electron donors: A technological application of radical cation chemistry
作者:Ian R Gould、Stephen A Godleski、Paul A Zielinski、Samir Farid
DOI:10.1139/v03-073
日期:2003.6.1
sensitizers in silver halide photography. Here, we describe studies of the nucleophile-assisted cleavage reactions of the CSi bonds in their radical cations. Water is identified as a useful nucleophile. It is found that the kinetics of these reactions are best described by taking into account a radical cation water complex. The cleavage reactions are also controlled by steric effects at silicon and
氨基硅烷具有适当的结构特征,可用作卤化银摄影中的双电子敏化剂。在这里,我们描述了 C 12 Si 键在其自由基阳离子中的亲核辅助裂解反应的研究。水被确定为有用的亲核试剂。发现这些反应的动力学最好通过考虑自由基阳离子 ?? 水复合体。裂解反应也受硅的空间效应和羧酸盐基团的邻近性控制,该羧酸盐基团可以改变水的亲核性。裂解形成α-氨基自由基,可以向作为溶液相电子受体的9,10-二氰基蒽提供第二个电子。关键词:硅烷,自由基阳离子,双电子敏化,碎裂,空间效应。
Derivatives of n-(arylsulfonyl)beta-aminoacids comprising a substituted aminomethyl group, the preparation method thereof and the pharmaceutical compositions containing same
申请人:——
公开号:US20040116353A1
公开(公告)日:2004-06-17
The invention relates to compounds of formula:
1
These compounds show affinity for the bradykinin receptors with selectivity towards the B
1
receptors; they may be used for the preparation of medicinal products intended for treating or preventing inflammation pathologies and persistent or chronic inflammatory diseases.
Discovery of (<i>R</i>)-4-Cyclopropyl-7,8-difluoro-5-(4-(trifluoromethyl)phenylsulfonyl)-4,5-dihydro-1<i>H</i>-pyrazolo[4,3-<i>c</i>]quinoline (ELND006) and (<i>R</i>)-4-Cyclopropyl-8-fluoro-5-(6-(trifluoromethyl)pyridin-3-ylsulfonyl)-4,5-dihydro-2<i>H</i>-pyrazolo[4,3-<i>c</i>]quinoline (ELND007): Metabolically Stable γ-Secretase Inhibitors that Selectively Inhibit the Production of Amyloid-β over Notch
作者:Gary Probst、Danielle L. Aubele、Simeon Bowers、Darren Dressen、Albert W. Garofalo、Roy K. Hom、Andrei W. Konradi、Jennifer L. Marugg、Matthew N. Mattson、Martin L. Neitzel、Chris M. Semko、Hing L. Sham、Jenifer Smith、Minghua Sun、Anh P. Truong、Xiaocong M. Ye、Ying-zi Xu、Michael S. Dappen、Jacek J. Jagodzinski、Pamela S. Keim、Brian Peterson、Lee H. Latimer、David Quincy、Jing Wu、Erich Goldbach、Daniel K. Ness、Kevin P. Quinn、John-Michael Sauer、Karina Wong、Hongbin Zhang、Wes Zmolek、Elizabeth F. Brigham、Dora Kholodenko、Kang Hu、Grace T. Kwong、Michael Lee、Anna Liao、Ruth N. Motter、Patricia Sacayon、Pamela Santiago、Christopher Willits、Frédérique Bard、Michael P. Bova、Susanna S. Hemphill、Lam Nguyen、Lany Ruslim、Kevin Tanaka、Pearl Tanaka、William Wallace、Ted A. Yednock、Guriqbal S. Basi
DOI:10.1021/jm301741t
日期:2013.7.11
Herein, we describe our strategy to design metabolically stable gamma-secretase inhibitors which are selective for inhibition of A beta generation over Notch. We highlight our synthetic strategy to incorporate diversity and chirality. Compounds 30 (ELND006) and 34 (ELND007) both entered human clinical trials. The in vitro and in vivo characteristics for these two compounds are described. A comparison of inhibition of A beta generation in vivo between 30, 34, Semagacestat 41, Begacestat 42, and Avagacestat 43 in mice is made. 30 lowered A in the CSF of healthy human volunteers.
Towards the synthesis of amino[b,e][1,4]dioxin derivatives via cationic ruthenium complexes
作者:Richard C. Cambie、George R. Clark、Sheryl L. Coombe、Sally A. Coulson、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1016/0022-328x(95)05717-4
日期:1996.1
Double nucleophilic aromatic substitution reactions between N-substituted (eta(6)-1,2-dichlorobenzene)RuCp(+) salts and substituted 1,2-benzenediols have been carried out under mild conditions to prepare N-substituted (eta(6)-dibenzo[b,e][1,4]dioxin)ruthenium(II) complexes. The dibenzodioxin ligands were subsequently liberated by photolysis, with radiation from a sunlamp or from a medium pressure Hg lamp (300 nm).