Bp. Pradhan et P. Ghosh, ACTION OF LITHIUM ETHYLENEDIAMINE ON SOME 1,2-DIKETONES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 32(5), 1993, pp. 590-591
1,4-Pyrazine derivatives have been prepared in a single step by reacti
on of 1,2-diketones such as benzil, 2,3-dioxolupene and 28-carbomethox
y-2,3-dioxolupane with ethylenediamine in the presence of lithium meta
l.