Control of Product Selectivity by a Styrene Additive in Ruthenium-Catalyzed C−H Arylation
作者:Shun Hiroshima、Daiki Matsumura、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1021/ol102325f
日期:2010.11.19
A unique effect of styrene additive on product selectivity was observed for RuH2(CO)(PPh3)3-catalyzed C−H arylation of acetophenone derivatives bearing two ortho C−H bonds. Without styrene, the C−H arylation with arylboronates gives diarylation products as the major products throughout the reaction, but the use of styrene as an additive switches the product selectivity and leads to selective formation
在RuH 2(CO)(PPh 3)3催化带有两个邻位CH键的苯乙酮衍生物的CHH芳基化反应中,可以观察到苯乙烯添加剂对产物选择性的独特影响。在没有苯乙烯的情况下,与芳基硼酸酯发生的CH芳基化反应将二芳基化产物作为整个反应的主要产物,但是使用苯乙烯作为添加剂会切换产物选择性,并导致选择性形成单芳基化产物。