Novel diarylsulfonylurea derivatives as potent antimitotic agents
摘要:
A novel series of diarylsulfonylurea derivatives were synthesized and evaluated for interaction with tubulin and for cytotoxicity against human cancer cell lines. These derivatives demonstrated good inhibitory activity against tubulin polymerization, which was well correlated with promising antiproliferative activity as well as G2/M phase cell cycle arrest. Furthermore, several compounds were also efficacious against multidrug-resistant cancer cells, which are resistant to many other known microtubule inhibitors. (C) 2004 Elsevier Ltd. All rights reserved.
用于心力衰竭的一类新型治疗药物,高效和选择性的GRK2抑制剂,在体外研究中表现出增强的β-肾上腺素信号传导能力。HTS将衍生物5和1,2,4-三唑衍生物24a鉴定为命中化合物。新一代的脚手架和所有部分的SAR研究都产生了带有N-苄基羧酰胺部分的4-甲基-1,2,4-三唑衍生物,对GRK2的活性很高,对其他激酶的选择性更高。在亚型选择性方面,这些化合物对GRK1、5、6和7表现出足够的选择性,并且对GRK3具有几乎相同的抑制作用。我们的药物化学努力导致发现了115h(GRK2 IC 50= 18 nM),获得了与人GRK2和GRK2抑制剂的共晶体结构,该抑制剂增强了β-肾上腺素能受体(βAR)介导的cAMP积累,并防止了用异丙肾上腺素处理过的表达β2AR的HEK293细胞中βAR的内在化。因此,115h似乎是心力衰竭治疗的一种新型疗法。
2,3-Disubstituted indoles bearing 2-hydroxyphenyl moieties at their C3 positions were synthesized from readily available 2-chlorophenols and alkynylanilines via aminopalladation/reductive elimination using Pd–dihydroxyterphenylphosphine catalyst. The catalyst accelerates the introduction of the 2-hydroxyphenyl group at the C3 position of the indole.
A one-pot procedure for trifluoroacetylation of arylamines using trifluoroacetic acid as a trifluoroacetylating reagent
作者:Junpei Ohtaka、Takeshi Sakamoto、Yasuo Kikugawa
DOI:10.1016/j.tetlet.2009.01.088
日期:2009.4
procedure for the preparation of aryl trifluoroacetamides from aryl amines is described that employs 2–4 M equiv of trifluoroacetic acid in refluxing xylene as a trifluoroacetylating agent. Addition of an amount of pyridine that is equimolar to the amount of trifluoroacetic acid present in the reaction mixture facilitates the trifluoroacetylation of rather basic arylamines.
We have developed a highly efficient method for the copper-catalyzed coupling of 2-haloacetanilides with phosphine oxides and phosphites in the presence of a catalytic amount of copper(I) iodide and N-methylpyrrolidine-2-carboxamide under mild conditions (45-55 °C); the P-arylation products were synthesized in good to excellent yields in short times using 2-bromotrifluoroacetanilides and 2-iodotrifluoroacetanilides
CuBr/N,N-Dimethylglycine-Catalyzed Coupling Reaction of 2-Chlorotrifluoroacetanilides with Phenols at Mild Conditions
作者:Chao Hao、Yihua Zhang、Yongwen Jiang、Dawei Ma
DOI:10.1002/cjoc.201090279
日期:2010.9
The ortho‐substituent effect directed by the CF3CONH group exists in CuBr/N,N‐dimethylglycine‐catalyzed diaryl ether formation from o‐chlorotrifluoroacetanilides and phenols, leading to this coupling reaction proceeding at 80°C to afford a wide range of diaryl ethers. The halogen‐exchange also plays an important role in this transformation because adding potassium iodide is essential for complete conversion
One-Pot Synthesis of Substituted Benzo[<i>b</i>]furans and Indoles from Dichlorophenols/Dichloroanilines Using a Palladium–Dihydroxyterphenylphosphine Catalyst
Sonogashira coupling of dichlorophenols and terminal alkynes, followed by cyclization and Suzuki–Miyauracoupling in one pot, using a palladium–dihydroxyterphenylphosphine (Cy-DHTP) catalyst. The use of substoichiometric amounts of tetrabutylammonium chloride was effective in accelerating the Suzuki–Miyauracoupling. This protocol was also successfully applied to the one-pot synthesis of disubstituted
二取代的苯并[ b ]呋喃是通过二氯苯酚和末端炔的邻位选择性Sonogashira偶联反应,然后使用钯-二羟基叔苯基膦(Cy-DHTP)催化剂在一个罐中进行环化和Suzuki-Miyaura偶联反应而合成的。亚化学计量的四丁基氯化铵的使用有效地加速了Suzuki-Miyaura偶联。该方案也成功地用于从二氯苯胺衍生物的一锅法合成二取代的吲哚。