A Straightforward Synthesis of Pyrazolines and Pyrazoles: Palladium-Catalyzed Carbonylative Vinylation-Cyclocondensation Reactions of Aryl Halides
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/ejoc.201100654
日期:2011.7.19
A novel consecutive one-pot synthesis of pyrazolines and pyrazoles starting from simple aryl halides, styrenes, carbon monoxide, and hydrazines has been established. Palladium-catalyzed carbonylative vinylation of aryl halides gave the corresponding chalcones, which are trapped in situ by addition of hydrazines.
已经建立了一种以简单的芳基卤化物、苯乙烯、一氧化碳和肼为原料连续一锅法合成吡唑啉和吡唑的方法。钯催化的芳基卤化物羰基化乙烯基化得到相应的查耳酮,通过加入肼原位捕获。