A Mild and Efficient Palladium-Catalyzed Cyanation of Aryl Mesylates in Water or tBuOH/Water
作者:Pui Yee Yeung、Chau Ming So、Chak Po Lau、Fuk Yee Kwong
DOI:10.1002/anie.201005121
日期:2010.11.15
Cool and compatible: Arylmesylates and tosylates underwent palladium‐catalyzed cyanation under mild, aqueous conditions at 65–80 °C (see scheme). In many cases, water could be used as the reaction medium without a cosolvent, and a variety of substituents R, such as keto, aldehyde, ester, free amine, and nitrile groups, remained intact during the transformation. Cy=cyclohexyl, Ms=methanesulfonyl,
A General Palladium-Phosphine Complex To Explore Aryl Tosylates in the N-Arylation of Amines: Scope and Limitations
作者:Pui Ying Choy、Kin Ho Chung、Qingjing Yang、Chau Ming So、Raymond Wai-Yin Sun、Fuk Yee Kwong
DOI:10.1002/asia.201800575
日期:2018.9.4
heterocycles such as indole, carbazole, pyrrole, 10‐phenothiazine, and 10‐phenoxazine were shown to be feasible coupling partners under this catalytic system. The described reaction conditions tolerate a wide range of functional groups and allow an array of aromatic amines as well as unsymmetrical amine products to be easily accessed from the various phenolic derivatives. Interestingly, this catalyst
N-Heterocyclic Carbene Derived Nickel-Pincer Complexes: Efficient and Applicable Catalysts for Suzuki-Miyaura Coupling Reactions of Aryl/Alkenyl Tosylates and Mesylates
作者:Jun-ichi Kuroda、Kiyofumi Inamoto、Kou Hiroya、Takayuki Doi
DOI:10.1002/ejoc.200900067
日期:2009.5
activities of NHC-derived nickel–pincercomplexes for the Suzuki–Miyauracouplingreactions of aryl/alkenyltosylates and mesylates are described. In the presence of a catalytic amount of nickelacycle 1a, a wide array of tosylates and mesylates reacted with several aryl- and alkenylboronic acids to afford the coupling products, generally in high yields. Fine tuning of the reaction conditions for each class
Efficient Route to 4-Substituted-2(5<i>H</i>)-furanones, 2(1<i>H</i>)-quinolones, and pyrones by Nickel-catalyzed Cross-coupling of Arenesulfonates with Organozinc Reagents
作者:Jie Wu、Xiaoyu Sun、Liang Zhang
DOI:10.1246/cl.2005.796
日期:2005.6
Nickel(II)-catalyzed cross-coupling reactions of 4-tosyl-2(1H)-quinolone, pyrone, and 2(5H)-furanone with various organozincreagents provide an efficient and practical method for the high-yielding...
Palladium-catalyzed Suzuki–Miyaura couplings of potassium aryl trifluoroborates with 4-tosyloxycoumarins or 4-tosyloxyquinolin-2(1H)-one
作者:Jie Wu、Liang Zhang、Hong-Guang Xia
DOI:10.1016/j.tetlet.2006.01.020
日期:2006.3
Pd(PPh3)4catalyzed Suzuki–Miyaura cross-coupling reactions of 4-tosyloxycoumarins or 4-tosyloxyquinolin-2(1H)-one with various potassium aryl trifluoroborates afforded the corresponding 4-substituted coumarins or 4-substituted quinolin-2(1H)-ones in good to excellent yield.