The reductive formylation of some quinoxaline derivatives
Abstract
Reduction of quinoxaline and its 2-methyl derivative by formic acid in formamide yields a mixture of the corresponding NN′-diformyl-1,2,3,4-tetrahydro-compound and 2,2′-biquinoxalinyl. 2-Hydroxyquinoxalines are converted into 4-formyl-1,2,3,4-tetrahydro-2-oxoquinoxalines. Condensation products formed from acetone and some nitroquinoxalines are described.