Mn-Mediated Coupling of Alkyl Iodides and Ketimines: A Radical Addition Route to α,α-Disubstituted α-Aminoesters
作者:Gregory K. Friestad、An Ji
DOI:10.1021/ol800733b
日期:2008.6.5
Coupling of primary and secondary alkyl iodides with N-acylhydrazonoesters via Mn-mediated photolysis conditions affords access to tert-alkyl amines.
经由Mn介导的光解条件将伯烷基碘和仲烷基碘与N-酰肼基酯偶联,可获得叔烷基胺。
<scp>L</scp>-Phenylalanine Cyclohexylamide: A simple and convenient auxiliary for the synthesis of optically pure α,α-disubstituted (<i>R</i>)- and (<i>S</i>)-amino acids
synthesis of a series of optically pure α,α-disubstituted (R)- and (S)-amino acids of type 1, such as (R)- and (S)-2-methyl-phenylalanine (1a), (R)- and (S)-2-methyl-2-phenylglycine (1b), and (R)- and (S)-2-methylvaline (1c; Scheme 3). These amino acids were efficiently transformed into the suitably protected and activated amino acid building blocks (R)- and (S)-12b and (R)- and (S)-12c (Scheme 4) which are