interactions was examined in Diels–Alder reactions and the conjugate addition of amines to acrylonitrile at different pressures. Its magnitude is lower than for other solvophobic media (water, ethylene glycol). Activation volumes determined in perfluorohexane are less negative for Diels–Alder cycloadditions owing to reduced fluorophobic interactions under pressure, in line with a former study. At variance
在Diels-Alder反应中以及在不同压力下将
胺类共轭加成到
丙烯腈中,研究了疏
水相互作用的动力学效应。其大小低于其他疏溶剂性介质(
水,
乙二醇)。与以前的研究一致,由于
全氟己烷在压力下减少的
氟相互作用减少了Diels-Alder环加成反应中负活化的量。由于疏溶剂加速和增强的电致伸缩的结合,在
氟介质中,共轭物的添加对压力更敏感。提出了多种活化方法(压力+疏
水活化)的一些合成应用,重点是
氟介质的有益疏溶剂性能。版权所有©2003 John Wiley&Sons,Ltd.