In Heck reactions with tributylamine as the base and in toluene, Pd(NH3)42+-mordenite (0.4 wt% Pd) and Pd0-mordenite (0.4 and 4 wt% Pd) are not only active and selective, but also truly heterogeneous catalysts, while oxidized PdII species in an all-oxygen environment, i.e. ionic Pd2+ or PdO, are prone to leaching.
在以
三丁胺作为碱、在
甲苯中进行的Heck反应中,Pd(NH3)42+-莫来石(0.4 wt% Pd)和Pd0-莫来石(0.4和4 wt% Pd)不仅活性和选择性好,而且真正是固相催化剂,而在全氧环境中氧化的PdII物种,即离子Pd2+或PdO,则容易发生浸出。