Synthesis and nucleophilic dearomatization of highly electrophilic [1,2,5]selenadiazolo[3,4-b]pyridines
作者:V. V. Ivanova、A. K. Fedorenko、A. M. Starosotnikov、M. A. Bastrakov
DOI:10.1007/s11172-022-3596-x
日期:2022.8
number of [1,2,5]selenadiazolo[3,4-b]pyridines were synthesized on the basis of readily available 5-R-2,3-diaminopyridines. It was found that these compounds can be involved into the reactions with C-nucleophiles (1,3-dicarbonyl compounds, indoles) under mild conditions, in some cases with no base required. As a result, stable products of nucleophilic addition to the pyridine ring, 1,4-dihydropyridines
在容易获得的 5-R-2,3-二氨基吡啶的基础上合成了许多 [1,2,5]硒二唑并[3,4- b ]吡啶。发现这些化合物可以在温和条件下参与与 C-亲核试剂(1,3-二羰基化合物,吲哚)的反应,在某些情况下不需要碱。结果,吡啶环亲核加成的稳定产物,即与硒二唑环稠合的 1,4-二氢吡啶,以高达 94% 的产率形成。