Studies on the action of sodium-ethylenediamine on α -diketo compounds
ABSTRACT Reactions of sodium / ethylenediamine (Na / EDA) have been carried out on α -diketones e.g. benzil (1), 4, 4 ⁄ -dibromo benzil (2) and on diketo triterpenoids e.g. 2, 3 diketo lupene (3) and 2, 3 diketo methyl dihydro betulonate (4). The resulting 1, 4 pyrazine derivatives have been characterized by UV, IR, NMR ( 1 H and 13 C), optical rotation, mass spectra and by comparison with authentic samples.