Direct Exchange of a Ketone Methyl or Aryl Group to Another Aryl Group through CC Bond Activation Assisted by Rhodium Chelation
作者:Jingjing Wang、Weiqiang Chen、Sujing Zuo、Lu Liu、Xinrui Zhang、Jianhui Wang
DOI:10.1002/anie.201206693
日期:2012.12.3
Swapped: Commercially available quinolinone derivatives (1 or 2, see scheme) were reacted with arylboronic acids in the presence of a RhI complex to give aryl(quinolin‐8‐yl)methanone products 3 in medium to good yields. A mechanism that involves the in situ oxidation of RhI to RhIII by O2 in the presence of CuI was proposed.
N-Heterocyclic Carbene–Palladium(II)–1-Methylimidazole Complex-Catalyzed Suzuki–Miyaura Coupling of Aryl Sulfonates with Arylboronic Acids
作者:Zhan-Yong Wang、Gao-Qi Chen、Li-Xiong Shao
DOI:10.1021/jo301270t
日期:2012.8.3
the Suzuki–Miyauracoupling of arylsulfonates including tosylates and phenylsulfonates with arylboronicacids, giving the desired coupling products in good to high yields. Acceptable yields can also be achieved even by using the less reactive mesylates as the substrates. It is worthy of noting here that this is the first example of NHC–Pd(II) complex-catalyzed Suzuki–Miyauracoupling of aryl sulfonates
showed efficient catalytic activity toward the Suzuki–Miyauracoupling of aryl sulfamates with arylboronic acids or potassium phenyltrifluoroborate, giving the expected coupling products in good to high yields. It should be noted that this is the first example so far of the phosphine-free, NHC–Pd(II) complexes catalyzed Suzuki–Miyauracoupling of aryl sulfamates with arylboronic acids.