Process for Preparing 2-Arylcarbonyl Compounds, 2-Aryl Esters and 2-Arylnitriles and their Heteroaromatic Analogues
申请人:Meudt Andreas
公开号:US20080221350A1
公开(公告)日:2008-09-11
Process for preparing compounds by cross-coupling of enolizable carbonyl compounds, nitriles or their analogues with substituted aryl or heteroaryl compounds in the presence of a Brönsted base and of a catalyst or precatalyst containing a.) a transition metal, a complex, a salt or a compound of this transition metal from the group V, Mn, Fe, Co, Ni, Rh, Pd, Ir, Pt) and b.) at least one sulphonated phosphane ligand in a solvent or solvent mixture.
Enantioselective carbene insertion into the N–H bond of benzophenone imine
作者:Jian Yang、Peiran Ruan、Wei Yang、Xiaoming Feng、Xiaohua Liu
DOI:10.1039/c9sc03354h
日期:——
Efficient enantioselective insertion of α-diazoesters into the N-H bond of N-sp2-hybridized benzophenone imine was realized by using Rh2(esp)2 and chiral guanidine cooperative catalysis. Both aliphatic and aromatic substituted α-amino esters were obtained in high yields (up to 99%) and good enantioselectivities (up to 95.5 : 4.5 er) under mild reaction conditions.
Primary resource: Hypervalent iodine-based aminating reagents containing a transferable (diarylmethylene)amino group can be used for the α-amination of simple carbonylcompounds such as esters, amides, and ketones in the presence of a lithium base. The (diarylmethylene)amino groups of the products can be readily modified, thus providing access to primary amines and diarylmethylamines.