Synthesis of <i>N</i>-(Isoquinolin-1-yl)sulfonamides via Ag<sub>2</sub>O-Catalyzed Tandem Reaction of <i>ortho</i>-Alkynylbenzaldoximes with Benchtop Stabilized Ketenimines
this project, a moderately efficient approach to multisubstituted N-(isoquinolin-1-yl)sulfonamide derivatives was illustrated, utilizing ortho-alkynylbenzaldoximes and zwitterionic ketenimine salts in a tandem reaction catalyzed by silver oxide. The oxophilicity of Ag2O, along with its nature as Lewisacid, pave the way for a smooth [3 + 2] cycloaddition between isoquinoline N-oxides and ketenimine species
Silver Triflate Catalyzed Reaction of 2-Alkynylbenzaldoxime with Phenol: A General and Facile Route to 1-Aroxyisoquinolines
作者:Zhiyong Wang、Jie Wu、Danqing Zheng
DOI:10.1055/s-0030-1260121
日期:2011.9
2-Alkynylbenzaldoxime reacts with phenol under the catalysis of silver triflate in the presence of bromo-tris-pyrrolidino-phosphonium hexafluorophosphate (PyBroP) under mild conditions, leading to the formation of 1-aroxyisoquinolines in good to excellent yields. cyclizations - isoquinoline - phosphorus ligands - phenol - silver triflate
Palladium-Catalyzed CH Oxidation of Isoquinoline N-Oxides: Selective Alkylation with Dialkyl Sulfoxides and Halogenation with Dihalo sulfoxides
作者:Bo Yao、Ren-Jie Song、Yan Liu、Ye-Xiang Xie、Jin-Heng Li、Meng-Ke Wang、Ri-Yuan Tang、Xing-Guo Zhang、Chen-Liang Deng
DOI:10.1002/adsc.201101009
日期:2012.7.9
palladium‐catalyzed CHoxidation of isoquinoline N‐oxides has been developed for regioselectively synthesizing substituted isoquinolines. The method represents the first example of using dialkylsulfoxides as the alkyl sources for the construction of 1‐alkylated isoquinolines. Moreover, the regioselective halogenation of isoquinoline N‐oxides is also successful using dihalosulfoxides as the halide sources