Application of cyclic ketones in MCR: Ugi/amide coupling based synthesis of fused tetrazolo[1,5-a][1,4]benzodiazepines
作者:Swapnil G. Yerande、Kiran M. Newase、Bhawani Singh、André Boltjes、Alexander Dömling
DOI:10.1016/j.tetlet.2014.04.040
日期:2014.5
Azido-Ugi reaction involving cyclic ketone, primary amine, isonitrile, and azide afforded substituted tetrazole derivatives 5. These intermediates were hydrolyzed to corresponding acid derivatives. EDAC/HOBt mediated amide bond formation of 5 gave fused tetrazolo[1,5-a][1,4]benzodiazepine 6 in high yield and good diversity.
涉及环酮,伯胺,异腈和叠氮化物的叠氮-Ugi反应可提供取代的四唑衍生物5。这些中间体被水解成相应的酸衍生物。EDAC / HOBt介导的5酰胺键形成以高收率和良好的多样性得到稠合的四唑并[1,5- a ] [1,4]苯并二氮杂6 6。