A Palladium NNC-Pincer Complex as an Efficient Catalyst Precursor for the Mizoroki−Heck Reaction
作者:Go Hamasaka、Shun Ichii、Yasuhiro Uozumi
DOI:10.1002/adsc.201800099
日期:2018.5.2
The Mizoroki−Heck reaction of aryl halides (iodides, bromides, or chlorides) with activated alkenes in the presence of a palladium NNC‐pincer complex at ppb to ppm loadings gave the corresponding internal alkenes in excellent yields. The total turnover number and turnover frequency reached up to 8.70×108 and 1.21×107 h−1 (3.36×103 s−1), respectively. The catalyst was applied in a ten‐gram‐scale synthesis
芳族卤化物(碘化物,溴化物或氯化物)与活性烯烃在钯NNC-钳夹配合物(ppb)至ppm负载量下的Mizoroki-Heck反应得到了相应的内部烯烃,收率很好。总周转次数和周转频率分别达到8.70×10 8和1.21×10 7 h -1(3.36×10 3 s -1)。该催化剂用于UV-B防晒剂辛诺酸酯(2-乙基己基4-甲氧基肉桂酸酯)的10克级合成。反应速率分析,反应混合物的透射电子显微镜检查和中毒试验表明,单体钯物质是催化循环中的催化活性物质。