Phenylamino-Pyrimidine (PAP) Derivatives: A New Class of Potent and Selective Inhibitors of Protein Kinase C (PKC)
作者:Jürg Zimmermann、Giorgio Caravatti、Helmut Mett、Thomas Meyer、Marcel Müller、Nicholas B. Lydon、Doriano Fabbro
DOI:10.1002/ardp.19963290707
日期:——
Phenylamino‐pyrimidines represent a novelclass of inhibitors of the proteinkinaseC with a high degree of selectivity versus other serine/threonine and tyrosine kinases. Steady state kinetic analysis of N‐(3‐[1‐imidazolyl]‐phenyl)‐4‐(3‐pyridyl)‐2‐pyrimidinamine (5), which showed potent inhibitory activity, revealed competitive kinetics relative to ATP. The adjacent H‐bond acceptor of the pyrimidine
苯氨基嘧啶是一类新型的蛋白激酶 C 抑制剂,与其他丝氨酸/苏氨酸和酪氨酸激酶相比具有高度选择性。N-(3-[1-咪唑基]-苯基)-4-(3-吡啶基)-2-嘧啶胺(5)的稳态动力学分析显示出有效的抑制活性,揭示了相对于ATP的竞争动力学。发现与苯胺的 H 键供体相邻的嘧啶部分的相邻 H 键受体对抑制活性至关重要。N-(3-Nitro-phenyl)-4-(3-pyridyl)-2-pyrimidinamine (7) 优先抑制 PKC-α (IC50 = 0.79 μM) 而不是其他测试的亚型。PKC-α 的抑制常数与对 T24 人膀胱癌细胞的抗增殖作用呈定性相关,但也有一些例外。
Metal-free synthesis of <i>gem</i>-difluorinated heterocycles from enaminones and difluorocarbene precursors
gem-difluorinated 2H-furans from reactions of BrCF2CO2Et with enaminones has been described. The reactions tolerate a wide variety of functional groups under metal-free conditions. An active aminocyclopropane is proposed to be a key intermediate through the cyclopropanation of difluorocarbene with enaminones, which further triggers a regioselective C–C bond cleavage in situ to afford the corresponding gem-difluorinated
已经描述了由 BrCF 2 CO 2 Et 与烯胺酮反应合成偕二氟化 2 H-呋喃的级联策略。该反应在无金属条件下耐受多种官能团。通过二氟卡宾与烯胺酮的环丙烷化反应,活性氨基环丙烷被认为是关键中间体,这进一步引发了区域选择性 C-C 键原位断裂,得到相应的偕二氟化2 H-呋喃。
A Straightforward Approach to Fluorinated Pyrimido[1,2-<i>b</i>]indazole Derivatives via Metal/Additive-Free Annulation with Enaminones, 3-Aminoindazoles, and Selectfluor
作者:Zhaoliang Xu、Xiao Geng、Yiwen Cai、Lei Wang
DOI:10.1021/acs.joc.2c00136
日期:2022.5.20
A novel and efficient three-component reaction with two C–N bonds and one C–F bond formation has been reported, which provides a straightforward route to a variety of fluorinated pyrimido[1,2-b]indazole derivatives. This transformation has the advantage of excellent functional group compatibility, including aliphatic and aromatic substituents enaminones. Moreover, metal and additives are not necessary
已经报道了一种具有两个 C-N 键和一个 C-F 键形成的新型高效三组分反应,它为各种氟化嘧啶并[1,2- b ]吲唑衍生物提供了一条直接的途径。这种转变具有优异的官能团相容性的优点,包括脂肪族和芳香族取代基烯胺酮。此外,该反应不需要金属和添加剂,这对含氟杂环化合物的合成和应用具有重要意义。
Electrochemical multicomponent [2+2+1] cascade cyclization of enaminones and primary amines towards the synthesis of 4-acylimidazoles
作者:Mingxu Wang、Ying Gao、Xiao-Jing Zhao、Lu Gao、Yonghui He
DOI:10.1039/d3cc06196e
日期:——
An electrochemical multicomponent [2+2+1] cascade cyclization of enaminones and primary amines towards the synthesis of 4-acylimidazoles has been developed. In an undivided cell, enaminones and primary amines can smoothly participate in this reaction to provide a series of 1,2-disubstituted 4-acylimidazoles at room temperature. The reaction avoids the use of both transition-metal catalysts and oxidation