Syntheses of All Isomers of Naphthalenetricarboxylic Acids
作者:Yasuhiko Dozen
DOI:10.1246/bcsj.45.519
日期:1972.2
isomers of naphthalenetricarboxylic acids have been synthesized by the oxidation of trimethylnaphthalenes, dimethylacetonaphthones, dimethylnaphthoic acids, methylnaphthalenedicarboxylic acids, β-(dimethylnaphthoyl)propionicacid, or β-(acenaphthoyl)propionicacids with aqueous sodium bichromate or potassium ferricyanide. Most of these naphthalenetricarboxylic acids, acid anhydrides, and trimethyl esters
Enantioselective C–H Amination Catalyzed by Nickel Iminyl Complexes Supported by Anionic Bisoxazoline (BOX) Ligands
作者:Yuyang Dong、Colton J. Lund、Gerard J. Porter、Ryan M. Clarke、Shao-Liang Zheng、Thomas R. Cundari、Theodore A. Betley
DOI:10.1021/jacs.0c09839
日期:2021.1.20
Investigation of 6 via single-crystal X-ray crystallography, NMR and EPR spectroscopies, and computations revealed a Ni(II)-iminyl radical formulation, similar to its dipyrrinato congener. Complex 4 exhibits enantioselective intramolecular C-H bond amination to afford N-heterocyclic products from 4-aryl-2-methyl-2-azidopentanes. Catalytic C-H amination occurs under mild conditions (5 mol % catalyst, 60 °C)