Heterocyclic compounds as P2X7 ion channel blockers
申请人:Shum Patrick
公开号:US20050026916A1
公开(公告)日:2005-02-03
The present invention relates to a novel series of 4,5-diphenyl-2-amino-4,5-dihydro-imidazole derivatives of the formula II:
wherein R, R
1
, R
2
, R
3
, R
4
, R
5
, X and Y are as defined herein. This invention also relates to methods of making these compounds. The compounds of this invention are P2X7 ion channel blockers and are therefore useful as pharmaceutical agents, especially in the treatment and/or prevention of a variety of diseases having an inflammatory component, including inflammatory bowel disease, rheumatoid arthritis and disease conditions associated with the central nervous system, such as stroke, Alzheimer's disease, etc.
Salicylic Acid‐Promoted Three‐Component Annulation of Benzimidazoles, Aryl Nitroalkenes and Elemental Sulfur
作者:Ruhuai Mei、Feng Xiong、Chenrui Yang、Jinwu Zhao
DOI:10.1002/adsc.202001564
日期:2021.3.29
an efficient mediator for the present transformation. This protocol provides a facile access to structurally significant imidazo[2,1‐b]thiazole skeleton from simple raw materials with a range of compatible synthetically useful functionalities. Furthermore, gram‐scale preparation of this method is effective, which enables potential applications of it in broader fields of molecule synthesis. Mechanistically
本文研究了苯并咪唑,芳基硝基烯烃和元素硫的三组分环化反应。发现便宜且容易获得的水杨酸是本转化的有效介体。该协议提供了从具有各种兼容的合成有用功能的简单原料轻松访问结构上重要的咪唑并[2,1- b ]噻唑骨架的方法。此外,这种方法的克级制备是有效的,这使其有可能在更广泛的分子合成领域中应用。从机理上讲,提出了一个反应级联反应,包括顺序的氮杂-迈克尔加成,亲核硫酸化和脱氨基芳构化。
Direct Catalytic Asymmetric Mannich-Type Reaction of Benzyl Isocyanide: Stereoselective Synthesis of 1,2-Diarylethylenediamines
作者:Keiji Tamura、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1002/ejoc.201500336
日期:2015.5
A directcatalyticasymmetricMannich-typereaction of benzyl isocyanide using a CuI catalyst and N-(diphenylthiophosphinoyl)imines was developed. The simultaneous activation strategy by soft–soft interaction was the key to promote the reaction using a weakly acidic pronucleophile, benzyl isocyanide. The spontaneous cyclization of the Mannich adduct afforded the corresponding enantioenriched imidazolines
开发了使用 CuI 催化剂和 N-(二苯基硫代膦酰基) 亚胺的苄基异氰化物的直接催化不对称曼尼希型反应。通过软-软相互作用的同时激活策略是使用弱酸性亲核试剂苄基异氰化物促进反应的关键。曼尼希加合物的自发环化得到相应的对映体富集的咪唑啉,它可能是各种 1,2-二芳基乙二胺的前体。
HETEROCYCLIC COMPOUNDS AS P2X7 ION CHANNEL BLOCKERS
申请人:SHUM Patrick
公开号:US20080132550A1
公开(公告)日:2008-06-05
The present invention relates to a novel series of 4,5-diphenyl-2-amino-4,5-dihydro-imidazole derivatives of the formula II:
wherein R, R
1
, R
2
, R
3
, R
4
, R
5
, X and Y are as defined herein. This invention also relates to methods of making these compounds. The compounds of this invention are P2X7 ion channel blockers and are therefore useful as pharmaceutical agents, especially in the treatment and/or prevention of a variety of diseases having an inflammatory component, including inflammatory bowel disease, rheumatoid arthritis and disease conditions associated with the central nervous system, such as stroke, Alzheimer's disease, etc.
Aminoguanidine-Catalyzed Reductive Cyclization of o-Phenylenediamines with CO<sub>2</sub> in the Presence of Triethoxysilane
作者:Yulin Sun、Ke Gao
DOI:10.1021/acs.joc.3c00026
日期:2023.6.2
An inexpensive and efficient aminoguanidine-catalyzed reductivecyclization of o-phenylenediamines with CO2 in the presence of triethoxysilane is described. Various functionalizedbenzimidazoles, benzoxazole, and benzothiazole were synthesized in high yields. Mechanistic studies indicate that formic acid as a cocatalyst promotes the cyclization reaction.