I2-Catalyzed three-component protocol for the synthesis of quinazolines
作者:Sumit Kumar Panja、Nidhi Dwivedi、Satyen Saha
DOI:10.1016/j.tetlet.2012.08.016
日期:2012.11
moderate temperature (40 °C) without the involvement of any chromatographic purification. Oxidizing and Lewis acidic properties of molecular I2 have been utilized here. Detailed mechanism has been established based on an isolated intermediate and its single crystal X-ray crystallographic structure.
activators. 3 Very re- cently Wang et al., reported an elegant synthesis of 2-phe- nylquinazolines employing molecular iodine/TBHP and also with supported copper oxide nanoparticles. 4 Truong et al. described copper-catalyzed Ullmann N-arylation coupling process to synthesize 2-phenylquinazolines from the corresponding o-iodobenzaldehydes and benzamidine hydrochloride under ligand-free conditions. 5 However
A novel and efficient protocol for the synthesis of 2-phenyl quinazolinederivatives is developed by recyclable graphite oxide as a catalyst, devoid of moisture sensitive metal catalysts and corrosive acidic reagents. This new procedure has afforded the desired products in good to excellent yields. The graphite oxide can be synthesized by a simple adoptable procedure from inexpensive and readily available
TMSOTf-catalyzed synthesis of substituted quinazolines using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions
作者:Chieh-Kai Chan、Chien-Yu Lai、Cheng-Chung Wang
DOI:10.1039/d0ob01507e
日期:——
we report an efficient and mild synthetic route for the construction of substituted quinazolines from functionalized 2-aminobenzophenones with various benzaldehydes using cat. TMSOTf and hexamethyldisilazane (HMDS) under neat, metal-free and microwave irradiation conditions in which gaseous ammonia was formed in situ. This synthetic protocol provided the desired quinazolines with a broad substrate scope
在本文中,我们报道了一种高效且温和的合成路线,用于使用cat由官能化的 2-氨基二苯甲酮与各种苯甲醛构建取代的喹唑啉。TMSOTf 和六甲基二硅氮烷 (HMDS) 在纯净、无金属和微波辐照条件下原位形成气态氨。这种合成方案提供了所需的喹唑啉,其底物范围广泛,产率良好。通过 X 射线单晶衍射分析证实了一些结构。
2-PYRIDIN-2-YL-QUINAZOLINE DERIVATIVES AS POTASSIUM CHANNEL MODULATING AGENTS FOR THE TREATMENT OF RESPIRATORY DISEASES
申请人:Eriksen Birgitte L.
公开号:US20090306102A1
公开(公告)日:2009-12-10
This invention relates to novel pyridinyl-quinazoline derivatives and their use as potassium channel modulating agents. Moreover the invention is directed to pharmaceutical compositions useful for the treatment or alleviation of diseases or disorders associated with the activity of potassium channels.