116668-80-5Relevant articles and documents
Nickel(0)/imidazolium carbene catalyst system for efficient cross-coupling of aryl bromides and chlorides with organomanganese reagents
Leleu, Anne,Fort, Yves,Schneider, Raphael
, p. 1086 - 1092 (2006)
N,N′-Bis(2,6-diisopropylphenyl)imidazolium chloride associated with nickel(II) acetylacetonate (3-5 mol%) was used as catalyst to efficiently cross-couple functionalized aryl bromides with organomanganese reagents. The reactions were performed between 0°C and room temperature, giving unsymmetrical biaryls in 0.25 to 24 h with 52 to 100% yields for isolated materials. Aryl chlorides showed slightly diminished reactivity in Ni/2 IPr-catalyzed cross-couplings and good yields could only be attained with activated or neutral substrates.
Visible-Light-Induced Arene C(sp 2)-H Lactonization Promoted by DDQ and tert -Butyl Nitrite
Chen, Bajin,Hu, Baoxiang,Hu, Xinquan,Jin, Liqun,Li, Meichao,Shen, Zhenlu,Sun, Nan,Wang, Shengpeng,Wang, Yiqing
supporting information, p. 261 - 266 (2020/02/18)
A visible-light photocatalytic aerobic oxidative lactonization of arene C(sp 2)-H bonds proceeds in the presence of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and tert -butyl nitrite (TBN). Under the optimized conditions, a range of 2-arylbenzoic acids is converted into the corresponding benzocoumarin derivatives in moderate to excellent yields. This method is characterized by its atom economy, mild reaction conditions, the use of a green oxidant and metal-free catalysis.
Silver-Catalyzed C(sp2)-H Functionalization/C-O Cyclization Reaction at Room Temperature
Dai, Jian-Jun,Xu, Wen-Tao,Wu, Ya-Dong,Zhang, Wen-Man,Gong, Ying,He, Xia-Ping,Zhang, Xin-Qing,Xu, Hua-Jian
, p. 911 - 919 (2015/01/30)
Silver-catalyzed C(sp2)-H functionalization/C-O cyclization has been developed. The scalable reaction proceeds at room temperature in an open flask. The present method exhibits good functional-group compatibility because of the mild reaction conditions. Using a AgNO3 catalyst and a (NH4)2S2O8 oxidant in CH2Cl2/H2O solvent, various lactones are obtained in good to excellent yields. A kinetic isotope effect (KIE) study indicates that the reaction may occur via a radical process.