Synthesis of 2-[(3-aminoalkyl or 3-bromoalkyl)amino]-4H-1-benzopyran-4-one derivatives
摘要:
The title compounds were advantageously synthesized from 2-(dialkylamino)chromones and 1,3-diaminopropane (or 1-amino-3-bromopropane) by amine exchange. The 3-cyano derivatives 5 were directly prepared from 2-(dimethylamino)chromones 1 and KCN by nitro displacement.