作者:Murat Kucukdisli、Till Opatz
DOI:10.1002/ejoc.201200424
日期:2012.8
furnish polysubstituted indolizines. Overall, the indolizine core can be constructed from a pyridine, two aldehydes, and a nitroalkane, and no undesired functional groups remain in the products. When bromoacetonitrile was used for the N-alkylation, indolizine-3-carbonitriles were obtained instead. The pyridine component may be replaced by other azines, giving rise to related heterocyclic systems.
吡啶与氰醇三氟甲磺酸酯或 α-卤腈的 N-烷基化提供 1-(1-氰基烷基)吡啶鎓盐,该盐可以在碱性条件下与硝基烯烃反应以提供多取代的茚茚。总的来说,吲哚嗪核可以由一个吡啶、两个醛和一个硝基烷烃构成,并且产物中没有残留的不需要的官能团。当溴乙腈用于 N-烷基化时,得到 indolizine-3-carbonitriles。吡啶组分可以被其他吖嗪替代,从而产生相关的杂环系统。