Aroyl chlorides react with acyclic and cyclic alkenes in the presence of a rhodium catalyst to give Mizoroki–Heck type and cyclization products, respectively. A rhodium-ethylene complex, [RhCl(C2H4)2}2], showed excellent performance for these reactions. Notably, the reactions can be conducted effectively under base- and phosphane-free conditions.
在铑催化剂的存在下,芳酰氯与无环和环状烯烃反应,分别得到Mizoroki-Heck型和环化产物。铑-乙烯络合物[RhCl(C 2 H 4)2 } 2 ]显示出对于这些反应的优异性能。值得注意的是,该反应可以在无碱和无膦的条件下有效地进行。
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−Heckreaction 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。
Rhodium(II)-Catalyzed Nondirected Oxidative Alkenylation of Arenes: Arene Loading at One Equivalent
作者:Harit U. Vora、Anthony P. Silvestri、Casper J. Engelin、Jin-Quan Yu
DOI:10.1002/anie.201310539
日期:2014.3.3
bimetallic RhII catalyst promoted the CH alkenylation of simple arenes at 1.0 equivalent without the use of a directing group. A phosphine ligand as well as cooperative reoxidation of RhII with Cu(TFA)2 and V2O5 proved essential in providing monoalkenylated products in good yields and selectivities, especially with di‐ and trisubstituted arenes.
双金属的Rh II催化剂促进与c H在1.0当量,而无需使用定向基团的简单的芳烃的烯基化。膦配体以及Rh II与Cu(TFA)2和V 2 O 5的协同再氧化被证明对于以高收率和选择性提供单烯基化产物至关重要,特别是对于二取代和三取代的芳烃。
Mizoroki–Heck type arylation of alkenes using aroyl chlorides under base-free conditions
作者:Toru Sugihara、Tetsuya Satoh、Masahiro Miura
DOI:10.1016/j.tetlet.2005.09.179
日期:2005.11
The Mizoroki–Heck type arylation of alkenes with aroylchlorides accompanied by decarbonylation efficiently proceeds in the presence of a palladium catalyst system, PdCl2(PhCN)2/(PhCH2)Bu3NCl, even without adding any base. The products can be isolated by a very simple procedure.
The reaction of arylsulfonyl chlorides with acrylate esters in the presence of a catalytic amount of PdCl2(PhCN)2 undersolid-liquidphasetransferconditions gives the corresponding 3-aryl-2-propenoates in good yields.