作者:Asta Žukauskaitė、Sven Mangelinckx、Gert Callebaut、Clarence Wybon、Algirdas Šačkus、Norbert De Kimpe
DOI:10.1016/j.tet.2013.02.065
日期:2013.4
The convenient synthesis of 1,5-diazaspiro[2.3]hexanes, as new structurally challenging strained diazaspirocyclic compounds, was developed starting from easily accessible ethyl 2-(bromomethyl)-1-tosylaziridine-2-carboxylate. The key transformations in the developed four-step sequence involved a chemoselective reduction of the functionalized ethyl 1-tosylaziridine-2-carboxylate to the corresponding
1,5-二氮杂螺并[2.3]己烷的合成很容易,是一种结构上具有挑战性的二氮杂螺环化合物,它是从易于获得的2-(溴甲基)-1-甲苯磺酰氮-2-羧酸乙酯开始开发的。所开发的四步序列中的关键转化涉及将官能化的1-甲苯磺酰基氮丙啶-2-羧酸乙酯化学选择性还原成相应的β-溴醛以及中间N-甲苯磺酰基2-(氨基甲基)的氮杂-佩因类型重排氮丙啶转化为N-烷基2-(氨基甲基)氮丙啶。形成的溴胺的最终碱介导的环化作用使新的二氮杂螺环系统得到了有效利用。