Tandem dimerization and double annulation of 3,3,4,4-Tetracyanobutanal acetal. Synthesis of a bicyclic 2-aminopyridine derivative
作者:Tsutomu Yokozawa、Akira Nishikata、Takamasa Kimura、Kazuki Shimizu、Tomoyuki Takehana
DOI:10.1016/s0040-4039(99)00850-3
日期:1999.6
obtained from tetracyanoethylene, ethyl vinyl ether, and ethanol, yielded 2-aminopyridine derivative 2 fused with cyclopentane in one pot in the presence of pyridine. On the basis of several experiments, the proposed mechanism involves the Michael reaction of 1 with the diene generated by the elimination of hydrogen cyanide and ethanol from 1, followed by double intramolecular nucleophilic additions to the
可以容易地从四氰基乙烯,乙基乙烯基醚和乙醇获得的3,3,4,4-三氯叔丁醛缩醛1在吡啶存在下于一锅中得到与环戊烷稠合的2-氨基吡啶衍生物2。在几个实验的基础上,提出的机理涉及1的迈克尔反应与二烯的迈克尔反应,该二烯通过从1消除氰化氢和乙醇而生成,然后将两个分子内亲核加成到氰基上。