Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) as a magnetically recyclable heterogeneous catalyst for the efficient synthesis of 2-indolyl-1-nitroalkanes and bis(indolyl)methanes
作者:Sara Sobhani、Roya Jahanshahi
DOI:10.1039/c3nj40899j
日期:——
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) was used as a new magnetically recyclable heterogeneous catalyst for the efficient synthesis of indole derivatives, such as 2-indolyl-1-nitroalkanes and bis(indolyl)methanes.
Sulfamic acid-catalyzed Michael addition of indoles and pyrrole to electron-deficient nitroolefins under solvent-free condition
作者:Li-Tao An、Jian-Ping Zou、Li-Li Zhang、Yong Zhang
DOI:10.1016/j.tetlet.2007.04.011
日期:2007.6
Sulfamic acid (SA) effectively catalyze the Michaeladdition of indoles and pyrrole to nitroolefins under solvent-free condition to afford the corresponding Michael adducts in good to excellent yields.
Chiral Bis(oxazolidine)pyridine–Copper-Catalyzed Enantioselective Friedel–Crafts Alkylation of Indoles with Nitroalkenes
作者:Takayoshi Arai、Toru Sato
DOI:10.1055/s-0033-1340311
日期:——
asymmetric Friedel–Crafts reaction of indoles with nitroalkenes was catalyzed by the stereochemically tunable bis(oxazolidine)pyridine (PyBodine)–Cu(OTf)2 complex. Using the PyBodine(Val)–Cu(OTf)2 catalyst gave the Friedel–Crafts adducts with highly enantioselective manner. For the 1,4-bis[(E)-2-nitrovinyl]benzene, the reaction proceeded in a meso-trick manner to give the chiral double Friedel–Crafts adduct
Montmorillonite K10 was found to catalyze the Michaeladdition of indoles or pyrrole with nitroalkenes efficientlyunder solventless condition. The short reaction time, simple workup, and excellent yields were noteworthy. The green catalyst could be reused for three runs without considerable variation in yield.
Asymmetric Ruthenium-Catalyzed Hydrogenation of Terpyridine-Type <i>N</i>-Heteroarenes: Direct Access to Chiral Tridentate Nitrogen Ligands
作者:Chenghao Li、Yixiao Pan、Yu Feng、Yan-Mei He、Youran Liu、Qing-Hua Fan
DOI:10.1021/acs.orglett.0c02268
日期:2020.8.21
first enantioselective hydrogenation of terpyridine-type N-heteroarenes has been successfully developed by using Ru(diamine) complexes as catalysts, providing partially reduced chiral pyridine-amine-type products in high yield (up to 93%) with excellent diastereo- and enantioselectivity (up to 94:6 dl/meso, > 99% ee). These pyridine-amine-type compounds can be served as a new class of chiral multidentate