Nap-Phos, representing a new naphthyl-phenyl biaryl-type phosphine ligand class and available by a short synthesis (4 steps, 71% overall yield), effectively catalyzes the Suzuki-Miyaura (including highly hindered cases), hydrodehalogenation, and Heck reactions.
New and Efficient Protocol for Arylation of Quinones
作者:Oleg Demchuk、K. Pietrusiewicz
DOI:10.1055/s-0028-1088118
日期:2009.4
A practical rhodium-mediated arylation of 1,4-quinones has been developed. The corresponding 2-aryl-1,4-quinones were obtained with excellent selectivity and high yields under convenient aerobic reaction conditions.
Nonaqueous arylated quinone catholytes for lithium–organic flow batteries
作者:Dong-Seon Shin、Minjoon Park、Jaechan Ryu、Inchan Hwang、Jeong Kon Seo、Kwanyong Seo、Jaephil Cho、Sung You Hong
DOI:10.1039/c8ta04720k
日期:——
synthesized in moderate to high yields by Pd-catalyzed Suzuki cross-coupling reactions. This study utilizes the synthetic quinones as redox-active organic molecules for nonaqueous lithium–organic flow batteries. The aryl moiety incorporated quinone scaffolds show enhanced electrochemical stability and rate capability. The nonaqueous catholyte, 2-phenyl-1,4-naphthoquinone, reaches a cell voltage of ∼2.6 V
化学改性的有机氧化还原对具有可调节的氧化还原特性,高溶解度,环境友好性和成本效益的优点。受自然界的启发,通过Pd催化的Suzuki交叉偶联反应,以中等至高收率合成了一系列带有供电子甲氧基或吸电子三氟甲基的醌衍生物。这项研究利用合成的醌作为非水锂有机液流电池的氧化还原活性有机分子。结合有芳基部分的醌支架显示出增强的电化学稳定性和速率能力。非水阴极电解质2-苯基-1,4-萘醌的电池电压约为2.6 V,比容量为196 mA hg -1,而放电容量在150个循环中保持在约92%。而且,管状锂有机液流电池系统在连续循环下具有稳定的循环性能,而不会引起间歇性流量的阻塞。
Palladium-catalyzed arylation of 1,4-naphthoquinones with aryl iodides and its synthetic application to the benzo[b]phenanthridine skeleton
作者:Yusuke Akagi、Toshiya Komatsu
DOI:10.1016/j.tetlet.2020.152446
日期:2020.10
We report a Pd-catalyzed arylation of 1,4-naphthoquinones with aryliodides. This reaction shows excellent functional group tolerance and high regioselectivity when using nonsymmetric 1,4-naphthoquinone. Furthermore, the resulting 2-aryl-1,4-naphthoquinone could be successfully converted into benzo[b]phenanthridine-7,12-dione through treatment with aqueous ammonia, followed by oxidative cyclization
我们报告钯与芳基碘化物催化的芳基化的芳基化。当使用非对称的1,4-萘醌时,该反应显示出优异的官能团耐受性和高的区域选择性。此外,通过用氨水处理,然后使用MnO 2进行氧化环化,可以将所得的2-芳基-1,4-萘醌成功地转化为苯并[ b ]菲啶-7,12-二酮。
Organophotoredox-catalyzed cyanoalkylation of 1,4-quinones
作者:Arun D. Kulthe、Sunidhi Jaiswal、Durga Golagani、Prathama S. Mainkar、Srirama Murthy Akondi
DOI:10.1039/d2ob00753c
日期:——
A mild and redox neutral cyanoalkylation of 1,4-quinones under organophotoredox conditions is reported.