[EN] CASPASE INHIBITORS CONTAINING ISOXAZOLINE RING<br/>[FR] INHIBITEURS DE CASPASES CONTENANT UN CYCLE ISOXAZOLINIQUE
申请人:LG LIFE SCIENCES LTD
公开号:WO2005021516A1
公开(公告)日:2005-03-10
The present invention relates to an isoxazoline derivative as an inhibitor against various caspases, a process for preparing the same, and a therapeutic composition for preventing inflammation and apoptosis comprising the same
4-addition and [3 + 2] cycloaddition reactions using chiral calcium species prepared from calcium isopropoxide and chiral bisoxazoline ligands have been developed. Glycine Schiff bases reacted with acrylic esters to afford 1,4-addition products, glutamic acid derivatives, in high yields with high enantioselectivities. During the investigation of the 1,4-addition reactions, we unexpectedly found that a [3
1,3-Stereoinduction in Radical Reactions: Radical Additions to Dialkyl 2-Alkyl-4-methyleneglutarates
作者:Ahlke Hayen、Rainer Koch、Wolfgang Saak、Detlef Haase、Jürgen O. Metzger
DOI:10.1021/ja003235j
日期:2000.12.1
Tin hydride-mediated radical additions to a series of α-methylene-glutarates 1, furnishing 2,4-dialkyl-substituted glutarates 3 are reported. The diastereoselectivity of hydrogen transfer to the intermediate adduct radicals 2, possessing a stereogenic center in γ-position, was disappointing in the temperature range of −78 to 80 °C. However, the reactions proved to be able to proceed with excellent
据报道,锡氢化物介导的自由基添加到一系列 α-亚甲基-戊二酸酯 1,提供 2,4-二烷基取代的戊二酸酯 3。在-78 至 80 °C 的温度范围内,氢转移到中间加合物自由基 2 的非对映选择性在 γ 位具有立体中心,令人失望。然而,根据 2- 和 4- 烷基取代基的空间影响以及酯-烷基部分和路易斯酸的选择,该反应被证明能够在螯合控制条件下以优异的 1,3- 非对映选择性进行. 使用 MgBr2·OEt2 作为添加剂,在 -78 °C 下初始叔丁基自由基加成后,顺向选择性达到 98:2。当较小的烷基如环己基,在 70 °C 时,MgBr2·OEt2 控制的途径中观察到高抗非对映选择性。乙基和甲基。在 -78 至 100 °C 的温度范围内观察到有趣且不常见的温度依赖性,揭示了强熵 ...
Compounds which inhibit beta-secretase activity and methods of use thereof
申请人:Oklahoma Medical Research Foundation
公开号:US20040121947A1
公开(公告)日:2004-06-24
Compounds inhibit memapsin 2 &bgr;-secretase activity and selectively inhibit memapsin 2 &bgr;-secretase activity relative to memapsin 1 &bgr;-secretase activity. The compounds are employed in methods to inhibit memapsin 2 &bgr;-secretase activity, in the treatment of Alzheimer's disease, in the inhibition of hydrolysis of a &bgr;-secretase site of a &bgr;amyloid precursor protein and to decrease &bgr;-amyloid protein in in vitro samples and in mammals. Proteins of memapsin 2 associated with compounds of the invention are crystallized.
作者:Howard Alper、Frederick W. Hartstock、Bertrand Despeyroux
DOI:10.1039/c39840000905
日期:——
Allene undergoes alkoxy–alkoxycarbonylation under exceedingly mild conditions (CO–O2–MeOH–PdCl2–CuCl2, 0 °C, 1 atm) affording methyl 2-methoxymethylacrylate in good yield; in the case of 1,1-disubstituted allenes the reaction is regiospecific although the product yields are lower.