A readily available pincer ruthenium(II) complex catalyzes the selective monoalkylation of (hetero)aromaticamines with a wide range of primaryalcohols (including pyridine-, furan-, and thiophene-substituted alcohols) with high efficiency when used in low catalyst loadings (1 mol %). Tertiary amine formation via polyalkylation does not occur, making this ruthenium system an excellent catalyst for
The synthesis of 2-ketopiperazine acetic acid esters and amides from ethylenediamines with maleates and maleimides
作者:Matthew M Abelman、Karl J Fisher、Edward M Doerffler、Paul J Edwards
DOI:10.1016/s0040-4039(03)00103-5
日期:2003.2
The reaction of substituted ethylenediamines with various fumarates, maleates, and maleimides to form substituted ketopiperazine aceticacidesters and amides was investigated. This method affords a straightforward, high yield approach to a variety of potential peptidomimetics and can yield surprising results with regard to regio- and stereoselectivity.
Palladium-Catalyzed Enantioselective C–H Activation of Aliphatic Amines Using Chiral Anionic BINOL-Phosphoric Acid Ligands
作者:Adam P. Smalley、James D. Cuthbertson、Matthew J. Gaunt
DOI:10.1021/jacs.6b12234
日期:2017.2.1
design of an enantioselective Pd(II)-catalyzed C-H amination reaction is described. The use of a chiral BINOL phosphoric acid ligand enables the conversion of readily available amines into synthetically valuable aziridines in high enantiomeric ratios. The aziridines can be derivatized to afford a range of chiral amine building blocks incorporating motifs readily encountered in pharmaceutically relevant
There are several reports on the synthesis of alkylamines, but most of the reported methods are not suitable for the synthesis of hindered amines. In this research, we found that a coppercatalyst is effective for the formation of congested C−N bonds at room temperature. Control experiments revealed that a copperamide is a key intermediate. Moreover, when a chiral amine was used, a quaternary carbon