作者:A. A. Aleksandrov、M. M. El’chaninov
DOI:10.1134/s1070363215040155
日期:2015.4
1-methyl-2-pyrrolidon afforded 2-(2-thienyl)oxazolo[4,5-b]pyridine. Reactivity of the latter towards electrophilic substitution (nitration, bromination, formylation, acylation) was studied. It is shown that the reaction occurred exclusively at the position 5 of the thiophene ring. Nucleophilic substitution of pyridine ring was performed. Quaternization of 2-(2-thienyl)oxazolo[4,5-b]pyridine with methyl
2-氨基-3-羟基吡啶与壬基氯在1-甲基-2-吡咯烷酮中的缩合得到2-(2-噻吩基)恶唑并[4,5- b ]吡啶。研究了后者对亲电取代的反应性(硝化,溴化,甲酰化,酰化)。结果表明,该反应仅在噻吩环的5位发生。进行吡啶环的亲核取代。用苯中的甲基碘将2-(2-噻吩基)恶唑并[4,5- b ]吡啶进行季铵化。用过量的二甲酰胺中的奇奇巴宾胺胺化失败。