Synthesis and SAR studies of potent H+/K+-ATPase and anti-inflammatory activities of symmetrical and unsymmetrical urea analogues
作者:Kadalipura P. Rakesh、Nanjudappa Darshini、Sunnadadoddi L. Vidhya、Rajesha、Ningegowda Mallesha
DOI:10.1007/s00044-017-1878-x
日期:2017.8
A sequence of symmetrical and unsymmetricalurea derivatives 1–24 were synthesized and characterized by standard spectroscopic techniques. The synthesized analogues were tested for their in vitro H+/K+-ATPase and anti-inflammatory activities. The majority of the compounds showed outstanding activity, compared to that of omeprazole and indomethacin, usual standard drugs of antiulcer and anti-inflammatory
合成了一系列对称和不对称的尿素衍生物1-24,并通过标准光谱技术进行了表征。测试了合成的类似物的体外H + / K + -ATPase和抗炎活性。与分别为抗溃疡和抗炎药的常用标准药物奥美拉唑和消炎痛相比,大多数化合物均具有出色的活性。特别是,羟基,甲基和甲氧基衍生物13-24是最活跃的化合物,对苯环上的各种取代基具有明显的扩增作用,因此对胃溃疡的抑制有积极作用。化合物1-3和22-24 由于分子上存在吸电子基团(Cl和F),因此具有出色的抗炎活性。
Cobalt(II)-Catalyzed Isocyanide Insertion Reaction with Amines under Ultrasonic Conditions: A Divergent Synthesis of Ureas, Thioureas and Azaheterocycles
作者:Tong-Hao Zhu、Xiao-Ping Xu、Jia-Jia Cao、Tian-Qi Wei、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1002/adsc.201300745
日期:2014.2.10
AbstractCobalt(II) acetylacetonate‐catalyzed isocyanide insertion reactions with amines utilizing tert‐butyl hydroperoxide (TBHP) as an oxidant under ultrasound conditions have been developed, which lead to the synthesis of ureas, thioureas, as well as 2‐aminobenzimidazoles, 2‐aminobenzothiazoles, and 2‐aminobenzoxazoles under the general reaction conditions in up to 96% yields, respectively. The intermediate amino methylidyneaminiums, initiated by cobalt(II) acetylacetonate‐catalyzed reactions of isocyanides with amines, could be easily trapped by different nucleophiles such as water, sulfur, and intramolecular nucleophilic functional groups. This method provides a simple, general and practical protocol for the divergent synthesis of ureas, thioureas and azaheterocycles.magnified image