Preparation of Polyfunctional Aryl Azides from Aryl Triazenes. A New Synthesis of Ellipticine, 9-Methoxyellipticine, Isoellipticine, and 7-Carbethoxyisoellipticine
摘要:
[GRAPHICS]The preparation of polyfunctional aryl azides by the reaction of aryl triazenes with NaN3 in the presence of KHSO4 or BF3 center dot OEt2/TFA (trifluoroacetic acid) has been described. A variety of functional groups (halides, esters, ketones, nitriles, aldehydes, and boronic esters) are tolerated under the Lewis acidic conditions. By using this methodology, the potent antitumor agents, ellipticine and 9-methoxyellipticine, have been synthesized. In addition, isoellipticine and a related derivative, 7-carbethoxyisoellipticine, were also prepared.
Highly chemoselective reduction of azides to amines by Fe(0) nanoparticles in water at room temperature
作者:Subir Panja、Debasish kundu、Sabir Ahammed、Brindaban C. Ranu
DOI:10.1016/j.tetlet.2017.07.076
日期:2017.8
A highly chemoselective reduction of aryl, heteroaryl, acyl and sulfonylazides to the corresponding amines has been achieved by Fe(0) nanoparticles in water at roomtemperature in the absence of external hydride source. Several readily reducible functionalities including alkene, alkyne, S-S linkage, OTBDMS remain unaffected during reduction.
A series of 28 novel 2‐(4‐aminophenyl)benzothiazole analogues have been synthesized and characterized using various analytical techniques like 1H NMR, 13C NMR, electrospray ionization mass spectrometry, and IR and bioevaluated for their antiproliferative activity over a group of three human cancer cell lines, namely, lung cancer (A549), cervical cancer (HeLa), and breast cancer (MDA‐MB‐231), using
已使用1 H NMR,13 C NMR,电喷雾电离质谱和IR等多种分析技术合成和表征了28个新颖的2-(4-氨基苯基)苯并噻唑类似物,并对它们在三个组中的抗增殖活性进行了生物评估使用磺基罗丹明B检测方法检测人类癌细胞系,即肺癌(A549),子宫颈癌(HeLa)和乳腺癌(MDA-MB-231)。很少有合成分子(5a,5c,5d,5f,7b和7j)显示出有效的生长抑制作用(GI 50))在0.2–1.7μM范围内的较低微摩尔浓度(GI 50)值下对被测人癌细胞系的活性。值得注意的是,化合物7b在GI 50范围为0.55–1.2μM的所有三种癌细胞系中均显示出合理的活性。此外,当筛选7b的微管蛋白聚合抑制时,在浓度为5.0μM时,其抑制率超过55%。分子对接模拟支持衍生物与靶向受体的分子相互作用。这些衍生物可以用作潜在的抗癌药物候选物开发的先导结构,而7b可以用作潜在的微管聚合抑制剂。
Cellulose sulphuric acid as a biodegradable catalyst for conversion of aryl amines into azides at room temperature under mild conditions
作者:FIROUZEH NEMATI、ALI ELHAMPOUR
DOI:10.1007/s12039-012-0261-1
日期:2012.7
This article describes simple and efficient method for the diazotization and azidation of different aromatic amines over cellulose sulphuric acid, sodium nitrite and sodium azide under mild conditions at room temperature. Various aryl amines possessing electron-withdrawing groups or electron-donating groups have been converted into the corresponding aryl azides with 71–99% yields. The use of mild reaction conditions, avoids the use of harmful acids and toxic solvents and short reaction times are advantages of this methodology. The selected catalyst is found to be highly efficient and recyclable.
[EN] SULFONAMIDE COMPOUNDS AS VOLTAGE-GATED SODIUM CHANNEL MODULATORS<br/>[FR] COMPOSÉS DE SULFONAMIDE À TITRE DE MODULATEURS DES CANAUX SODIQUES VOLTAGE-DÉPENDANTS
申请人:LUPIN LTD
公开号:WO2017037682A1
公开(公告)日:2017-03-09
The present invention relates to sulfonamide compounds Formula (I) wherein the substituents are as described herein, and their use in a medicine for the treatment of diseases, disorders associated with the inhibition of Voltage-gated sodium channels (VGSC) particularly NaV1.7. It further relates to the compounds herein and their pharmaceutically acceptable salts thereof, pharmaceutical compositions thereof useful in treating diseases, disorders, syndromes and/or conditions associated with the inhibition of Voltage-gated sodium channels (VGSC) particularly NaV1.7. The invention also relates to process for the preparation of the compounds of the invention. (I)