A simple base-mediated tandem SN2'/SNV reaction of readily available -trifluoromethyl-, -unsaturated carbonylcompounds with N-tosylated 2-aminomalonates was developed, which provide an efficient access to functionalized tetrasubstituted 2-fluoro-2-pyrrolines in good to...
Copper-Catalyzed Annulation of Oxime Acetates with α-Amino Acid Ester Derivatives: Synthesis of 3-Sulfonamido/Imino 4-Pyrrolin-2-ones
作者:Chun-Bao Miao、An-Qi Zheng、Li-Jin Zhou、Xinyu Lyu、Hai-Tao Yang
DOI:10.1021/acs.orglett.0c00870
日期:2020.5.1
A copper-catalyzed annulation of oxime acetates and α-amino acidesterderivatives for the easy preparation of 4-pyrrolin-2-ones bearing a 3-amino group has been developed. This process features the oxidation of amines with oxime esters as the internal oxidant to produce the active 1,3-dinucleophilic and 1,2-dielectrophilic species concurrently. The subsequent nucleophilic cyclization realizes the
Copper(II) Triflate Catalyzed Amination of 1,3-Dicarbonyl Compounds
作者:Thi My Uyen Ton、Fanny Himawan、Joyce Wei Wei Chang、Philip Wai Hong Chan
DOI:10.1002/chem.201201219
日期:2012.9.17
A method to prepare α,α‐acyl amino acid derivatives efficiently by Cu(OTf)2+1,10‐phenanthroline (1,10‐phen)‐catalyzed amination of 1,3‐dicarbonyl compounds with PhINSO2Ar is described. The mechanism is thought to initially involve aziridination of the enolic form of the substrate, formed in situ through coordination to the Lewis acidic metal catalyst, by the putative copper–nitrene/imido species generated