The enolates derived from diethyl malonate and its 2-substituted analogues aminate in good yield with 0-(2, 4-dinit, rophenyl) hydroxylamine (1) as an amino-transfer reagent. The 2- aminomalonates thus produced are readily converted to the corresponding amino acids by hydrolysis and decarboxylation. As the ester enolates become more basic, less amino-group transfer is observed, although the aminating reagent 1 is converted to 2, 4-dinitrophenol in ...
