Imidazole derivatives as histamine receptor H3 (ANT) agonists
申请人:Institut National de la Sante et de la Recherche Medical
公开号:US06248765B1
公开(公告)日:2001-06-19
Novel imidazole derivatives as histamine receptor H3 antagonists and/or agonists, preparation thereof and therapeutical uses thereof. Chemical compounds for use as histamine receptor H3 agonists, partial agonists or antagonists, having general formula (Ia) or (Ib), the use thereof for making drugs, and methods for revealing the agonist, partial agonist or antagonist activity of such compounds in vivo, are disclosed.
Novel Histamine H<sub>3</sub>-Receptor Antagonists with Carbonyl-Substituted 4-(3-(Phenoxy)propyl)-1<i>H</i>-imidazole Structures like Ciproxifan and Related Compounds
Novel histamine H(3)-receptor antagonists possessing a 4-(3-(phenoxy)propyl)-1H-imidazole structure generally substituted in the para-position of the phenyl ring have been synthesized according to Mitsunobu or S(N)Ar reactions. With in vitro and in vivo screening for H(3)-receptor antagonist potency, the carbonyl-substituted derivatives proved to be highly active compounds. A number of compounds showed
comprehensive mechanistic studies indicate that a free carbyne radical intermediate is formed via the photocatalyticsingleelectrontransfer process, and KH2PO4 plays a crucial role in significant improvements on yield and selectivity based on density-functional theory calculations, providing a new direction for radical coupling reactions of diazo compounds.
我们报告了使用 α-重氮三氟甲磺酸锍和水聚合合成 1,4-二羰基Z-烯烃形成炔烃的一般方案。C=O、C=C 和 C-H 键是在温和条件下形成的,具有广泛的官能团耐受性。该反应表现出优异的Z选择性和完全的区域选择性。得到的 1,4-二羰基Z-烯烃可以顺利进行后续转化为各种杂芳族支架。此外,该反应还通过直接使用 D 2提供了一种容易获得相应的氘代Z烯烃和氘代杂芳烃的方法,这些氘代具有高水平的氘掺入(90-97% D-inc.)。O,从而使该方法具有很高的价值。综合机理研究表明,通过光催化单电子转移过程形成了游离的碳炔自由基中间体,基于密度泛函理论计算, KH 2 PO 4在显着提高产率和选择性方面发挥了关键作用,为光催化单电子转移过程提供了新的方向。重氮化合物的自由基偶联反应。
Catalyst‐Controlled Divergent Generations and Transformations of <i>α</i>‐Carbonyl Cations from Alkynes**
作者:Junrui Zhou、Weilin Wang、Fenfang Zuo、Shupeng Liu、Pathan Mosim Amin、Kangbao Zhong、Ruopeng Bai、Youliang Wang
DOI:10.1002/anie.202302545
日期:2023.12.4
Catalyst-controlled divergent generations of α-carbonyl cations from single alkyne functionalities and their divergent further transformations have been established. Broad spectrum of alkynes including aryl alkyne, ynamide, alkynyl ether, and alkynyl sulfide could be utilized. The intermediacy of α-carbonyl cations via the N−O bond cleavage was supported by DFT calculations in both catalytic systems