B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Transfer Hydrogenation of Imines and Related Heteroarenes Using Cyclohexa-1,4-dienes as a Dihydrogen Source
作者:Indranil Chatterjee、Martin Oestreich
DOI:10.1002/anie.201409246
日期:2015.2.2
)borane, B(C6F5)3, is shown to abstract a hydride from suitably donor‐substituted cyclohexa‐1,4‐dienes, eventually releasing dihydrogen. This process is coupled with the FLP‐type (FLP=frustrated Lewis pair) hydrogenation of imines and nitrogen‐containing heteroarenes that are catalyzed by the same Lewis acid. The net reaction is a B(C6F5)3‐catalyzed, i.e., transition‐metal‐free, transfer hydrogenation
已显示强硼路易斯酸三(五氟苯基)硼烷B(C 6 F 5)3从适当的供体取代的环己-1,4-二烯中提取氢化物,最终释放出二氢。该过程与亚胺和含氮杂芳基的FLP型氢化(FLP =失意的Lewis对)加氢反应相同的Lewis酸催化。最终反应是使用易于获得的环己-1,4-二烯作为还原剂,经B(C 6 F 5)3催化,即无过渡金属转移氢化。讨论了有或没有游离二氢参与的竞争反应途径。