4-{[(4-氰基苯基)(4 H -1,2,4-三唑-4-基)氨基]甲基}苯基氨基磺酸酯及其邻位卤代(F、Cl、Br)衍生物是第一代双芳香化酶和硫酸酯酶抑制剂(DASI)。对这些化合物进行了构效关系研究,并对它们的结构进行了各种修改,包括重新定位卤素原子、引入更多的卤素原子、用另一个基团替换卤素、用二氟亚甲基接头替换亚甲基接头、用其他环结构取代对氰基苯环,用咪唑基取代三唑基。发现的最有效的体外 DASI 是一种咪唑衍生物,其 IC 为50JEG-3 细胞制剂中针对芳香酶和类固醇硫酸酯酶的值分别为 0.2 和 2.5 n M。该化合物的母体酚抑制芳香酶,在同一试验中的 IC 50值为 0.028 n M。
4-{[(4-氰基苯基)(4 H -1,2,4-三唑-4-基)氨基]甲基}苯基氨基磺酸酯及其邻位卤代(F、Cl、Br)衍生物是第一代双芳香化酶和硫酸酯酶抑制剂(DASI)。对这些化合物进行了构效关系研究,并对它们的结构进行了各种修改,包括重新定位卤素原子、引入更多的卤素原子、用另一个基团替换卤素、用二氟亚甲基接头替换亚甲基接头、用其他环结构取代对氰基苯环,用咪唑基取代三唑基。发现的最有效的体外 DASI 是一种咪唑衍生物,其 IC 为50JEG-3 细胞制剂中针对芳香酶和类固醇硫酸酯酶的值分别为 0.2 和 2.5 n M。该化合物的母体酚抑制芳香酶,在同一试验中的 IC 50值为 0.028 n M。
use of amino alcohols as alkylating agents was demonstrated. The catalyst tolerates numerous functional groups, including hydrogenation‐sensitive examples. Compared to many other alcohol‐based amine alkylation methods, where a stoichiometric amount of base is required, our Cr‐based catalyst system gives yields higher than 90 % for various alkyl amines with a catalytic amount of base. Our study indicates
Reusable Co-nanoparticles for general and selective <i>N</i>-alkylation of amines and ammonia with alcohols
作者:Zhuang Ma、Bei Zhou、Xinmin Li、Ravishankar G. Kadam、Manoj B. Gawande、Martin Petr、Radek Zbořil、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1039/d1sc05913k
日期:——
A general cobalt-catalyzed N-alkylation of amines with alcohols by borrowing hydrogen methodology to prepare different kinds of amines is reported. The optimal catalyst for this transformation is prepared by pyrolysis of a specific templated material, which is generated in situ by mixing cobalt salts, nitrogen ligands and colloidal silica, and subsequent removal of silica. Applying this novel Co-nanoparticle-based
Efficient Protocol for Reductive Amination of Aldehydes and Ketones with Sodium Borohydride in an Ionic Liquid/H<sub>2</sub>O System
作者:K. Nagaiah、V. Naveen Kumar、R. Srinivasa Rao、B. V. S. Reddy、A. V. Narsaiah、J. S. Yadav
DOI:10.1080/00397910600941356
日期:2006.11.1
Abstract The imines were generated in situ from carbonyl compounds and amines, which undergo smooth reduction with sodium borohydride in an ionic liquid/H2O solvent system. The reaction conditions were very mild and neutral to afford the corresponding highly functionalized amines in excellent yields. IICT Communication No. 041013.
Mechanistic Studies of Hydride Transfer to Imines from a Highly Active and Chemoselective Manganate Catalyst
作者:Frederik Freitag、Torsten Irrgang、Rhett Kempe
DOI:10.1021/jacs.9b05024
日期:2019.7.24
highly active and chemoselective manganese catalyst for the hydrogenation of imines. The catalyst has a large scope, can reduce aldimines and ketimines, and tolerates a variety of functional groups, among them hydrogenation sensitive examples such as an olefin, a ketone, nitriles, nitro groups and an aryl iodo substituent or a benzyl ether. We could investi-gate the transfer step between imines and the
我们介绍了一种用于亚胺加氢的高活性和化学选择性锰催化剂。该催化剂适用范围广,可还原醛亚胺和酮亚胺,可耐受多种官能团,其中对氢化敏感的例子如烯烃、酮、腈、硝基和芳基碘取代基或苄基醚。我们可以详细研究亚胺和氢化物配合物之间的转移步骤。我们发现配体的双重去质子化是必不可少的,过量的碱不会导致转移步骤中的更高速率。我们将实际的加氢催化剂鉴定为 K-Mn-双金属物种,并且可以通过 X 射线分析获得氢化物转移后形成的 K-Mn 配合物的结构。核磁共振实验表明氢化物转移是一个明确定义的反应,这是亚胺的一级,双金属(K-Mn)氢化物的一级,并且速率与钾碱的浓度无关。我们提出了一种外球机制,其中质子似乎不参与速率确定步骤,导致底物中的瞬态带负电荷的氮原子与 HOtBu(2-methylpropan-2-ol)迅速反应以产生胺。这是基于几个观察结果,例如反应速率不依赖于 HOtBu 浓度,没有可观察到的锰酰胺
AMINOPHENYLCYCLOPROPYL CARBOXYLIC ACIDS AND DERIVATIVES AS AGONISTS TO GPR40
申请人:Corbett David Francis
公开号:US20090105257A1
公开(公告)日:2009-04-23
The present invention relates generally to novel therapeutic compounds and more particularly to novel compounds, their use as GPR40 agonists, processes for their manufacture, and intermediates useful in their preparation.