Application of Azide-Tetrazole Tautomerism and Arylsulfanyl Group Dance in the Synthesis of Thiosubstituted Tetrazoloquinazolines
作者:Irina Novosjolova、Māris Turks、Andris Jeminejs、Svetlana M. Goliškina、Dmitrijs Stepanovs、Ērika Bizdēna
DOI:10.1055/s-0040-1706568
日期:2021.4
4-diazidoquinazoline) undergoes regioselective nucleophilic aromatic substitution with thiols at C5 and forms 5-(alkyl/arylthio)tetrazolo[1,5-a]quinazolines, the structure of which has been proved by X-ray crystallography. The latter exist in tautomeric equilibrium with their 2-azidoquinazoline form, which provides possibility for copper-catalyzed azide–alkyne 1,3-dipolar cycloaddition reaction, leading to the 4-al
4-芳硫基-2-氯喹唑啉与NaN 3之间的亲核芳族取代反应以不寻常的硫烷基跳动发生,并导致形成5-(芳硫基)四唑并[1,5- c ]-喹唑啉,而后者不形成叠氮互变异构体,不与炔烃发生CuAAC反应。另一方面,5-azidotetrazolo [1,5- a ] quinazoline (正式描述为2,4-diazidoquinazoline)在C5处用硫醇进行区域选择性亲核芳香取代,并形成5-(烷基/芳硫基)tetrazolo [1,5-一种喹唑啉,其结构已通过X射线晶体学证明。后者以2-叠氮喹啉形式互变异构平衡存在,这为铜催化的叠氮化物-炔烃1,3-偶极环加成反应提供了可能性,从而导致了4-烷基/芳硫基-2-(1 H -1,2, 3-三唑-1-基)喹唑啉。