Novel Parallel Reaction between a [1,5] Sigmatropic Alkylthio Shift and a [1,5] Sigmatropic Hydrogen Shift Observed in a 2<i>H</i>-Azepine Ring
作者:Yasuhiro Kubota、Kyosuke Satake、Hideki Okamoto、Masaru Kimura
DOI:10.1021/ol062131w
日期:2006.11.1
Although heating 2-methoxy-2H-azepine results in a [1,5] sigmatropic hydrogen shift, heating 2-propylthio-2H-azepine results in not only a [1,5] sigmatropic hydrogen shift but also a [1,5] sigmatropic propylthio shift. Kinetic measurements reveal that migratory aptitudes increase in the order of MeO < H, PrS. These [1,5] sigmatropic shifts are discussed on the basis of ab initio DFT calculations. [reaction:
尽管加热2-甲氧基-2H-a庚因会导致[1,5]σ氢转移,但加热2-丙基硫基-2H-a庚因不仅会导致[1,5]σ氢转移,而且还会导致[1,5]。 σ-丙硫基转移。动力学测量表明,迁移能力以MeO