Induktive und sterische Effekte bei der B<scp>ECKMANN</scp>-C<scp>HAPMAN</scp>-Umlagerung von Alkyl-ketoxim-pikryläthern
作者:H. P. Fischer、F. Funk-Kretschmar
DOI:10.1002/hlca.19690520408
日期:——
The rates of the BECKMANN-CHAPMAN rearrangement of the ketoximpicryl-ethers 1a–1k in 1, 4-dichlorobutane are correlated with parameters describing the bulk of the substituted groups R and R′. From regression analyses it is concluded that the relative rate constants are mainly controlled by steric contributions in the ground state, such as geminal interactions of R with R′ and vicinal interactions of
1,4-二氯丁烷中酮基氧辛基醚1a-1k的贝克曼-查普曼重排速率与描述取代基R和R'的大部分的参数相关。从回归分析可以得出结论,相对速率常数主要受基态的空间贡献控制,例如R与R'的双键相互作用和R'与OX的邻键相互作用,而归纳效应则较少。