Synthesis of Unnatural <b>α</b>-Amino Acid Derivatives via a Three-Component Coupling Method Utilizing an Allylpalladium Umpolung
作者:Helena Malinakova、Chad Hopkins
DOI:10.1055/s-2007-990845
日期:2007.11
Highly substituted unnatural α-amino esters, for example, ethyl 3-alkyl-4-(aryl or vinyl)-2-(N-4-methoxyphenyl-amine)pent-4-enoates were prepared in a regiocontrolled and diastereoselective manner via Pd(II)-catalyzed three-component coupling of boronic acids and allenes with ethyl iminoacetate relying on the umpolung of the traditional electrophilicity of mono-π-allylpalladium complexes. The 2-aminopent-4-enoates