Derivatives of 5-amidine indole as inhibitors of thrombin catalytic activity
摘要:
Substituted 5-amidine indoles were constructed based upon a computational analysis of putative modes of binding to thrombin utilizing coordinates from the crystal structure of BMS-183,507-alpha-thrombin complex. These analogs display competitive kinetics for the inhibition of human cr-thrombin. The most potent member of this series 17, shows marked potency for thrombin with an inhibition constant, K-i of 260 nM. Copyright (C) 1996 Elsevier Science Ltd
通过简单的方法制备了一系列的酰胺衍生物,用于炔烃与酰胺和磺酰胺的加氢酰胺化。使用诸如碳酸铯之类的弱碱可以促进后者的转化,并且催化量的氯化铁(III)的添加在某些所述加氢酰胺化反应的结果中具有有益的作用。还通过两种互补方法从邻-炔基苯胺合成了一系列吲哚,这对于从邻-(2-氨基苯基炔基)苯胺构建吲哚并[1,2- c ]喹唑啉四环体系是有用的。
Iminyl radicals are reactive intermediates that can be used for the construction of various valuable heterocycles. Herein, the electrochemical decarboxylation of α-imino-oxy acids for the generation of iminyl radicals has been accomplished under exogenous-oxidant- and metal-free conditions through the use of nBu4NBr as a mediator. The resulting iminyl radicals undergo intramolecular cyclization smoothly
亚胺基是反应性中间体,可用于构建各种有价值的杂环。在此,通过使用n Bu 4 NBr 作为介体,在无外源氧化剂和无金属条件下完成了用于产生亚胺基自由基的 α-亚氨基-羟基酸的电化学脱羧。所得亚胺基自由基与相邻的(杂)芳烃顺利进行分子内环化,得到一系列吲哚稠合的多环化合物。
A new chiral Brønsted acid, generated in situ from a chiral phosphoric acid boron (CPAB) complex and water, was successfully applied to asymmetric indole reduction. This "designer acid catalyst", which is more acidic than TsOH as suggested by DFT calculations, allows the unprecedented direct asymmetricreduction of C2-aryl-substituted N-unprotected indoles and features good to excellent enantioselectivities
InBr3-catalyzed intramolecular cyclization of 2-alkynylanilines leading to polysubstituted indole and its application to one-pot synthesis of an amino acid precursor
作者:Norio Sakai、Kimiyoshi Annaka、Takeo Konakahara
DOI:10.1016/j.tetlet.2005.11.121
日期:2006.1
We describe InBr3-catalyzed cyclization of 2-alkynylaniline derivatives having a variety of functional groups producing polysubstituted indoles. This methodology could be applied to the one-pot synthesis of an amino acid precursor by the addition of a catalytic amount of the indium salt, an imine, and TMSCl.
InBr<sub>3</sub>-Promoted Divergent Approach to Polysubstituted Indoles and Quinolines from 2-Ethynylanilines: Switch from an Intramolecular Cyclization to an Intermolecular Dimerization by a Type of Terminal Substituent Group
Use of a 2-ethynylaniline having an alkyl or aryl group on the terminal alkyne selectively produced a variety of polyfunctionalized indole derivatives in moderate to excellent yields via indium-catalyzed intramolecular cyclization of the corresponding alkynylaniline. In contrast, employment of a substrate with a trimethylsilyl group or with no substituent group on the terminal triple bond, exclusively