Abstract
Amination of α-lithiated carboxylic acid salts was investigated using isovaleric acid mainly. Methoxyamine bearing a proper electronic character was the best aminating reagent, as shown in Table I. Several α-amino acids, e.g., valine, leucine, methionine, phenylalanine, and α-phenylglycine, were prepared by this new method, summarized in Table II. The synthesis of two new aminating reagents, 3, 5-dinitromesitoxyamine and 2-tetrahydropyranyloxyamine were described.
