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
Structurally Divergent Synthesis of Azetidines, 5,6‐Dihydro‐1,3‐oxazines and 2,3‐Dihydro‐1,4‐oxazines through Palladium‐Catalyzed Tandem Allylic Substitution Reaction
A regiodivergent synthesis of azetidines, 5,6-dihydro-1,3-oxazines and 2,3-dihydro-1,4-oxazines has been achieved through palladium-catalyzed tandem allylicsubstitution reaction. This protocol provides a variety of heterocycles in satisfactory yields with good to excellent regioselectivities under mild reaction conditions.
Brønsted Acid Catalyzed Amination of 1,3-Dicarbonyl Compounds by Iminoiodanes
作者:Philip Chan、Ciputra Tejo、Hui Yeo
DOI:10.1055/s-0033-1340108
日期:——
A synthetic method to aminate 1,3-dicarbonyl compounds with PhI=NTs using BrOnsted acid catalysis is described herein. The method was shown to be applicable to -keto esters and phosphonates as well as 1,3-diones, providing the corresponding ,-acyl amino acid derivatives in moderate to excellent yields.