Room-temperature palladium-catalyzed direct 2-alkenylation of azole derivatives with alkenyl bromides
作者:Yun-Xin Yao、Dong-Mei Fang、Feng Gao、Xiao-Xia Liang
DOI:10.1016/j.tetlet.2018.11.058
日期:2019.1
mild conditions, and the reaction of substituted benzoxazoles, oxazole and benzothiazole occurred even at room temperature. The substrate scope of the reaction was turned out to include mono-, di- and trisubstituted alkenyl bromides. To validate the scalability of this method, 5-Methyl-2-(prop-1-en-2-yl)benzoxazole (3c) was prepared on one-gram scale at room temperature.
在温和的条件下,Pd催化的唑衍生物直接进行C2-烯基化反应,即使在室温下,取代的苯并恶唑,恶唑和苯并噻唑的反应也能有效进行。结果反应的底物范围包括单,二和三取代的烯基溴化物。为了验证该方法的可扩展性,在室温下以1克规模制备了5-甲基-2-(丙-1-烯-2-基)苯并恶唑(3c)。