进行了铜盐催化的芳香族化合物与元素硫属元素的反应,并以分子氧作为氧化剂。在CuTC(铜(I)噻吩羧酸盐)存在下,3-取代的咪唑并[1,5- a ]吡啶与元素硫的反应以良好的定量收率得到了相应的双咪唑并吡啶基硫化物。即使在有氧氧化条件下,反应也进行。极性溶剂的使用对于反应至关重要,尤其是DMSO(二甲基亚砜)会促进反应。该反应可应用于常见的芳族化合物,例如N-甲基吲哚和二烷基苯胺。吲哚的反应在亲核的C3位置进行,而不是在酸性的C2位置进行。另外,二烷基苯胺的反应以邻位,对位进行。咪唑并吡啶与元素硒在相似条件下的反应得到相应的双咪唑并吡啶二硒化物和双咪唑并吡啶单硒化物。在相同条件下,未反应的咪唑并吡啶易于将得到的二硒化物转化为相应的单硒化物。该反应可用于双官能双咪唑并吡啶和元素硫的共聚,以定量收率得到低聚物。
Synthesis of 2-Azaindolizines by Using an Iodine-Mediated Oxidative Desulfurization Promoted Cyclization of N-2-Pyridylmethyl Thioamides and an Investigation of Their Photophysical Properties
摘要:
Iodine-mediated, oxidative desulfurization promoted cyclization of N-2-pyridylmethyl thioamides serves as an efficient and versatile method for the preparation of 2-azaindolizines (imidazo[1,5-a]pyridines) and rare 2-azaindolizine sulfur-bridged dimers. The 2-azaindolizines prepared in this manner are readily converted to a variety of fluorescent compounds by using transition-metal-catalyzed cross-coupling reactions.
SILICON BASED DRUG CONJUGATES AND METHODS OF USING SAME
申请人:BlinkBio, Inc.
公开号:US20170202970A1
公开(公告)日:2017-07-20
Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.
The present invention provides compounds and compositions thereof which are useful as inhibitors of plasma kallikrein and which exhibit desirable characteristics for the same.
本发明提供了作为血浆激肽酶抑制剂并具有相同理想特性的化合物及其组合物。
A study on the reaction of 3-alkyl(aryl)imidazo[1,5-<i>a</i>]pyridines with ninhydrin
作者:Mervat S. Sammor、Mustafa M. El-Abadelah、Ahmad Q. Hussein、Firas F. Awwadi、Salim S. Sabri、Wolfgang Voelter
DOI:10.1515/znb-2018-0039
日期:2018.6.27
Abstract The reaction of 3-alkyl(aryl)imidazo[1,5-a]pyridines (1) with ninhydrin in dichloromethane at room temperature delivered good yields of the respective 2-hydroxy-2-(imidazo[1,5-a]pyridine-1-yl)indene-1,3-diones. In the presence of dimethyl acetylenedicarboxylate (DMAD), this uncatalyzed electrophilic substitution reaction, involving C-1 (in 1) and the central C=O (in ninhydrin), takes precedence
A novel approach for the synthesis of imidazo and triazolopyridines from dithioesters
作者:Ajjahalli B. Ramesha、Nagarakere C. Sandhya、Chottanahalli S. Pavan Kumar、Mahanthawamy Hiremath、Kempegowda Mantelingu、Kanchugarakoppal S. Rangappa
DOI:10.1039/c6nj01038e
日期:——
Various imidazo- and triazolo-pyridines were synthesised by the intramolecular cyclization of pyridine 2-methylamine and dithioesters under mild conditions.
通过在温和条件下进行吡啶-2-甲胺和二硫酯的分子内环化,合成了各种咪唑和三唑吡啶。
ANTAGONISTS ACTING AT MULTIPLE PROSTAGLANDIN RECEPTORS FOR THE TREATMENT OF INFLAMMATION
申请人:Allergan, Inc.
公开号:US20150210689A1
公开(公告)日:2015-07-30
Compounds, processes for their preparation, pharmaceutical compositions containing such compounds and their use in treating therapeutic conditions, in particular conditions mediated by the action of ligands on the FP, DP, EP
1
, EP
4
, IP, DP
1
, FP and TP prostaglandin (PG) receptors thereby providing a general anti-inflammatory response.