Synthesis of enantiomerically enriched (<i>R</i>)-<sup>13</sup>C-labelled 2-aminoisobutyric acid (Aib) by conformational memory in the alkylation of a derivative of L-alanine
作者:Stephen P Fletcher、Jordi Solà、Dean Holt、Robert A Brown、Jonathan Clayden
DOI:10.3762/bjoc.7.152
日期:——
coworkers for the enantioselective alkylation of cyclic N-naphthoyl derivatives of amino acids was used to introduce a (13)C label into one of the two enantiotopic methyl groups of 2-aminoisobutyric acid (Aib) by retentive alkylation of L-alanine with (13)CH(3)I. Conditions were identified for optimization of yield and enantiomeric purity, and the absolute configuration of the labelled product was established