Chemistry of sulfenic acids. 7. Reason for the high reactivity of sulfenic acids. Stabilization by intramolecular hydrogen bonding and electronegativity effects
C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated nickel(II) N-heterocyclic carbene complexes
作者:Fang-Jie Guo、Jing Sun、Zhao-Qing Xu、Fritz E. Kühn、Shu-Liang Zang、Ming-Dong Zhou
DOI:10.1016/j.catcom.2017.02.007
日期:2017.6
C-S cross-coupling of aryl halides with alkyl thiols catalyzed by in-situ generated Ni (II) N-heterocyclic carbene (NHC) complexes is investigated. Good to excellent yields can be obtained for a variety of aryl halides when using 5 mol% of the Ni (II)-NHC catalyst and 1.5 eq. of KOtBu. Both the electronic and steric effects of the NHC ligands on the catalytic performance of Ni (II)-NHC, as well as the
Primary sulfonamide as a coupling partner: Copper(I)-catalyzed regioselective cross-coupling of 2-nitro benzenesulfonamides with thiol through the cleavage of Ar–SO<sub>2</sub>NH<sub>2</sub> bonds
作者:Junmin Chen、Kuo Zhang、Yongli Zhao、Shouzhi Pu
DOI:10.1080/00397911.2018.1441420
日期:2018.6.3
article, we have presented a novel and efficient method for the directsynthesis of unsymmetrical sulfides through the copper(I)-catalyzed cross-coupling of 2-nitro benzenesulfonamides with thiols in the presence of catalytic amount of CuI in DMF as solvent at 100 °C. In addition, the products were obtained in high to excellent yields. More importantly, the novelsystem showed the primary 2-nitro benzenesulfonamides
Direct Cross-Coupling Access to Diverse Aromatic Sulfide: Palladium-Catalyzed Double C–S Bond Construction Using Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub> as a Sulfurating Reagent
作者:Zongjun Qiao、Jianpeng Wei、Xuefeng Jiang
DOI:10.1021/ol500112y
日期:2014.2.21
The Pd-catalyzed cross-coupling of aryl halides, alkyl halides, and Na2S2O3 center dot 5H(2)O to deliver aromatic thioethers is described. Pyridine, furan, thiophene, benzofuran, benzoxazole, benzothiophene, benzothiazole, and pyrazine are all amenable to this protocol. The odorless and stable solid Na2S2O3 center dot 5H(2)O was used as a convenient and environmentally friendly source of sulfur. Pd-catalyzed cross-couplings without thiols or thiophenols to build C-S bonds have not previously been achieved, which renders our observation more striking.
Thioethers from Halogen Compounds and Cuprous Mercaptides. II