43019-96-1Relevant articles and documents
Nickel-mediated C(sp2)-H amidation in synthesis of secondary sulfonamides via sulfonyl azides as amino source
Xu, Peng,Ding, Peng-Fei,Zhang, Mei-Qi,Xia, Yu-Shi,Xie, Ting
supporting information, (2021/02/16)
In this paper, Ni(II)- Catalyzed ortho-amidation of C(sp2)-H bond with sulfonyl azides directed by (quinolin-8-yl) amine (AQ-amine) is described. The method provides a straightforward method for the synthesis of sulfonamides from available sulfonyl azides via the transition-metal-catalyzed C(sp2)-N bond forming reaction. The amidation reactions exhibit high functional group compatibility, which might proceed a Ni(III)/Ni(I) catalytic cycle. We also applied sulfonamide compound in OLEDs, which exhibits the certain application potential in OLEDs field.
Co(III)-Catalyzed [4+1] Annulation of Amides with Allenes via C?H Activation
Boobalan, Ramadoss,Santhoshkumar, Rajagopal,Cheng, Chien-Hong
, p. 1140 - 1145 (2019/01/30)
A Co(III)-catalyzed [4+1] annulation of amides with allenes to synthesize isoindolone and 1,5-dihydro-pyrrol-2-one derivatives is reported. A wide range of aromatic and vinylic amides react with allenes to give the corresponding annulation products in good to excellent yields. The mechanistic studies strongly support that the catalytic reaction proceeds through an amide-directed C?H activation, followed by carbocobaltation of allene, β-hydride elimination, and an intramolecular 1,2-hydroamination. (Figure presented.).
Synthesis of isoquinolones: Via Rh-catalyzed C-H activation of substituted benzamides using air as the sole oxidant in water
Upadhyay, Nitinkumar Satyadev,Thorat, Vijaykumar H.,Sato, Ryota,Annamalai, Pratheepkumar,Chuang, Shih-Ching,Cheng, Chien-Hong
, p. 3219 - 3224 (2017/07/28)
Most of the metal-catalyzed C-H activation/annulation reactions were carried out in organic solvents using expensive oxidants such as Cu(ii) and Ag(i) salts. Here, we reported a new approach for a highly regioselective synthesis of isoquinolones from N-alkyl benzamides and alkynes using an Rh(iii) catalyst and inexpensive oxygen as the sole oxidant in an aqueous medium. In the reaction, water gave the highest product yield among the solvents used. In addition, at the end of the reaction, the isoquinolone product directly precipitated out from the aqueous solution. The methodology can be applied to a gram scale synthesis. This Rh(iii)-catalyzed reaction shows interesting meta selectivity with the meta substituted benzamide and shows various regioselectivities with different substituted alkynes. Moreover, the methodology can be applied to the preparation of biologically active compounds having the isoquinolone core.
