已经开发了在K 2 S 2 O 8存在下,用乙酸/ 1,4-二恶烷溶剂组合的钯催化的富电子芳烃的直接烷化反应。1,4-二恶烷共溶剂显着影响反应速率,产生选择性二取代的烯烃,而乙酰丙酮配体的添加显示出增加了单官能化芳烃链烯化的位点选择性。这些羰基配体的参与已通过ESI-MS研究确认,并确定了催化循环中的一些关键原位中间体。可以在直接氧化偶合中使用多种富电子芳烃和烯烃底物,以中等至良好的产率得到二取代的烯烃。
Aerobic Oxidative Coupling of Arenes and Olefins through a Biomimetic Approach
作者:Beneesh P. Babu、Xu Meng、Jan-E. Bäckvall
DOI:10.1002/chem.201300100
日期:2013.3.25
Arenes and electron‐deficient olefins can be oxidatively coupled through a biomimetic Pd(OAc)2‐catalyzed transformation. CH activation of the arene partner is effected under reaction conditions of low catalyst loading, normal oxygen pressure, and using p‐benzoquinone and iron phthalocyanine as electron‐transfer mediators (ETMs). By controlling catalyst loading, the reaction can be made selective for
Controlling reactivity in the Fujiwara–Moritani reaction: Examining solvent effects and the addition of 1,3-dicarbonyl ligands on the oxidative coupling of electron rich arenes and acrylates
作者:Roderick C. Jones
DOI:10.1016/j.tetlet.2019.151471
日期:2020.2
alkenation of electron rich arenes in the presence of K2S2O8 with an acetic acid/1,4-dioxane solvent combination has been developed. The 1,4-dioxane co-solvent dramatically influences the rate of reaction, giving selectively disubstituted alkenes, while the addition of acetylacetone ligands was shown to increase site selectivity for the alkenation of monofunctionalized arenes. The participation of these
已经开发了在K 2 S 2 O 8存在下,用乙酸/ 1,4-二恶烷溶剂组合的钯催化的富电子芳烃的直接烷化反应。1,4-二恶烷共溶剂显着影响反应速率,产生选择性二取代的烯烃,而乙酰丙酮配体的添加显示出增加了单官能化芳烃链烯化的位点选择性。这些羰基配体的参与已通过ESI-MS研究确认,并确定了催化循环中的一些关键原位中间体。可以在直接氧化偶合中使用多种富电子芳烃和烯烃底物,以中等至良好的产率得到二取代的烯烃。