Site-Selective Cu-Catalyzed Alkylation of α-Amino Acids and Peptides toward the Assembly of Quaternary Centers
作者:Marcos San Segundo、Arkaitz Correa
DOI:10.1002/cssc.201802216
日期:2018.11.23
The CuI‐catalyzed selective α‐alkylation of α‐amino acid and peptide derivatives with 2‐alkyl‐1,3‐dioxolanes is reported. This oxidative coupling is distinguished by its site‐specificity, high diastereoselectivity, and chirality preservation and exhibits absolute chemoselectivity for N‐aryl glycine motifs over other amino acid units. Collectively, the method allows for the assembly of challenging quaternary
Metal-free, visible-light driven α-C(sp<sup>3</sup>)–H <i>gem</i>-difluoroallylation of glycine derivatives with trifluoromethyl alkenes and 1,3-enynes
A metal free, visible-light driven α-C(sp3)−H gem-difluoroallylation of glycine derivatives with CF3-alkenes and 1,3-enynes is presented under redox-neutral conditions with good yields and excellent functional group compatibility.