作者:Murat Kucukdisli、Till Opatz
DOI:10.1002/ejoc.201402618
日期:2014.9
An efficient method for the synthesis of 2-aminoindolizines by the 5-exo-dig cyclization of 2-alkyl-1-(1-cyanoalkyl)pyridinium salts has been developed. These substrates were prepared by N-alkylation of 2-alkylpyridines with readily available cyanohydrin triflates. The method allows the introduction of various substituents at the 1-, 3-, 6-, 7-, and 8-positions and leaves no undesired acceptor groups
已开发出一种通过 2-烷基-1-(1-氰基烷基)吡啶鎓盐的 5-exo-dig 环化合成 2-氨基茚茚的有效方法。这些底物是通过 2-烷基吡啶与容易获得的氰醇三氟甲磺酸酯的 N-烷基化制备的。该方法允许在 1-、3-、6-、7- 和 8- 位引入各种取代基,并且不会在产物中留下不需要的受体基团。