Elimination Reactions of <i>N</i>-Alkyl<i>-N</i>-chlorothenylamines Promoted by MeONa−MeOH and Et<sub>2</sub>NH−MeCN. Effect of the β-Aryl Group on the Imine-Forming Transition State
作者:Sang Yong Pyun、Dong Choon Lee、Yoon Je Seung、Bong Rae Cho
DOI:10.1021/jo050368k
日期:2005.6.1
Eliminationreactions of N-alkyl-N-chlorothenylamines 1−4 with MeONa−MeOH and Et2NH−MeCN have been studied kinetically. The eliminationreactions are regiospecific, producing only the conjugated imines. The reactions are second order and exhibit substantial values of Hammett ρ and kH/kD, and an E2 mechanism is evident. The relative rates of elimination for Me/Et/i-Pr/t-Bu substituents are 1/0.5/0.2/0