Synthesis of a Variety of 2-Alkyl-2-Azabicyclo[3.1.1]heptane-1-carbonitriles via a Dynamic Addition-Intramolecular Substitution Sequence
作者:Christian Stevens、Ann De Blieck
DOI:10.1055/s-0030-1260811
日期:2011.7
An improved two-step synthetic approach towards 3-(2-chloroethyl) cyclobutanone is described and used in the synthesis of a class of 2-alkyl-2-azabicyclo[3.1.1]heptane-1-carbonitriles. The key step consists of a reversible addition of hydrogen cyanide onto the in situ generated imines, followed by an intramolecular nucleophilic substitution, thereby leading to the bicyclic skeleton in moderate to good
描述了一种改进的 3-(2-氯乙基) 环丁酮的两步合成方法,并用于合成一类 2-烷基-2-氮杂双环 [3.1.1] 庚烷-1-腈。关键步骤包括将氰化氢可逆地添加到原位生成的亚胺上,然后进行分子内亲核取代,从而以中等至良好的产率 (47-92%) 生成双环骨架。这些双环化合物是稳定的,使用氢化铝锂可以很容易地将引入的氰基以高产率 (93-99%) 还原为相应的氨基甲基。