Synthesis and structure of new substituted 2-dicyanomethylene-1,2-dihydropyridines
作者:Luis Fuentes、César Márquez、Ma Carmen Contreras、Ma Jesús Lorenzo、Isabel Fonseca、Juliana Sanz-Aparicio、José L. Balcazar
DOI:10.1002/jhet.5570320105
日期:1995.1
The synthesis of substituted 2-dicyanomethylene-1,2-dihydropyridines 3b-c and 2-dicyanomethylene-2,3,4,5-tetrahydropyridine 4 is accomplished from malononitrile dimer and propenenitriles 2. All structures were determined by nmr techniques; however to put our structural assignment for 6-amino-3-cyano-5-ethoxycarbonyl-2-dicyanomethylene-1,2-dihydropyridine 3d on a firm and unequivocal basis we decided
取代的2-二氰基亚甲基-1,2-二氢吡啶3b-c和2-二氰基亚甲基-2,3,4,5-四氢吡啶4的合成是由丙二腈二聚体和丙烯腈2完成的。所有结构均通过核磁共振技术确定。然而,为了牢固而明确地将6-氨基-3-氰基-5-乙氧基羰基-2-二氰基亚甲基-1,2-二氢吡啶3d的结构赋值,我们决定对该化合物进行X射线衍射分析。