BUCKLAND P. R., J. HETEROCYCL. CHEM., 1980, 17, NO 2, 397-398
作者:BUCKLAND P. R.
DOI:——
日期:——
A novel improved synthesis of 3-aminopyrazine-2-carboxylic acid
作者:Paul R. Buckland
DOI:10.1002/jhet.5570170238
日期:1980.3
A three step synthesis of 3-aminopyrazine-2-carboxylicacid (1) starting from pyrazine-2,3-dicarboxylic acid (5) is described. Diacid 5 is converted via the anhydride 6 into the ammonium salt of the half acid amide 7 which on Hofmann rearrangement gives the title compound in 55% overall yield.