Studies on the diastereoisomeric and conformational aspects of benzoyl dipeptide esters, as a means of assessing racemisation using nuclear magnetic resonance spectroscopy
作者:John S. Davies、R. John Thomas
DOI:10.1039/p19810001639
日期:——
Distinct methyl ester signals in the 1Hn.m.r. spectra of diastereoisomeric forms of benzoyl dipeptide methyl esters provide a means of estimating the isomer composition of diastereoisomeric mixtures. Analysis of the mixture derived from peptide-coupling reactions using this n.m.r. technique provides a convenient means of comparing the racemisation potential of a series of coupling reagents. Significant
苯甲酰基二肽甲基酯的非对映异构体形式的1 H nmr光谱中的不同甲酯信号为估算非对映异构体混合物的异构体组成提供了一种手段。使用这种核磁共振技术对衍生自肽偶联反应的混合物进行分析,为比较一系列偶联试剂的消旋潜力提供了便利的方法。在模型肽偶联过程中,显着的不对称诱导伴随着外消旋作用。已使用13 C nmr光谱研究了构象效应,并已合理化了在1 H nmr光谱中观察非对映异构酯信号的结构标准。
Biaryl Benzylamine Derivatives
申请人:Angst Daniela
公开号:US20100168079A1
公开(公告)日:2010-07-01
The present invention relates to biaryl-benzylamine compounds, to processes for their production, to their use as pharmaceuticals and to pharmaceutical compositions comprising them.
本发明涉及双芳基-苄基胺化合物,其生产方法,作为药物的应用,以及包含它们的药物组合物。
[EN] COMPOUNDS FOR AMIDE-FORMING REACTIONS<br/>[FR] COMPOSÉS POUR DES RÉACTIONS DE FORMATION D'AMIDE
申请人:UNIV TENNESSEE RES FOUNDATION
公开号:WO2013180815A1
公开(公告)日:2013-12-05
Provided herein is a compound of Formula I, that displays remarkable physicochemical properties as a peptide-coupling additive for peptide-forming reactions in water, wherein said coupling reactions proceed without measurable racemization. A method of producing the compound of Formula I comprising reaction of a malononitrile precursor compound with sodium nitrite and glacial acetic acid, is also provided.
作者:Dale L. Boger、Holger Keim、Berndt Oberhauser、Erwin P. Schreiner、Carolyn A. Foster
DOI:10.1021/ja990918u
日期:1999.7.1
the DGCN α-center permitting the utilization of a readily available l-amino acid precursor to the d α-hydroxy carboxylicacid residue. An alternative and similarly attractive approach of direct macrolactonization of a substrate necessarily incorporating a d-DGCN subunit proved viable albeit less effective. Biological evaluation in cellular assays for vascular adhesion molecule expression confirmed that
详细介绍了环状七肽 HUN-7293 (1) 的首次全合成,这是一种具有抗炎特性的细胞粘附分子表达的强效抑制剂。最有效的方法依赖于异常有效的大环化,形成 MLEU3-LEU4 仲酰胺,这可能受益于无环底物的分子内 H 键预组织。必需的线性缩酚肽与后期引入的连接酯聚合组装,该酯化作用发生在 DGCN α-中心的反转中,允许利用容易获得的 l-氨基酸前体生成 d α-羟基羧酸残留物。一种替代且类似有吸引力的直接大环内酯化方法,必须结合 d-DGCN 亚基,证明是可行的,尽管效果较差。血管粘附分子表达的细胞测定中的生物学评估证实合成 HUN-7923 (1...
Compounds for inhibiting &bgr;-amyloid peptide release and/or its synthesis
申请人:Elan Pharmaceuticals, Inc.
公开号:US06211235B1
公开(公告)日:2001-04-03
Disclosed are compounds which inhibit &bgr;-amyloid peptide release and/or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed are pharmaceutical compositions comprising a compound which inhibits &bgr;-amyloid peptide release and/or its synthesis.