Efficient Synthesis of Novel Coumarin-3-carboxamides (=2-Oxo-2H-1-benzopyran-3-carboxamides) Containing Lipophilic Spacers
作者:Saeed Balalaie、Mohammad Ali Bigdeli、Enayatollah Sheikhhosseini、Azizollah Habibi、Hamed Piri Moghadam、Mehrnoush Naderi
DOI:10.1002/hlca.201100238
日期:2012.3
The novel coumarin‐3‐carboxamides (=2‐oxo‐2H‐1‐benzopyran‐3‐carboxamides) 5a–5g containing lipophilic spacers were synthesized through the Ugi‐four‐component reaction (Scheme 1). The reactions of aromatic aldehydes 1, 4,4′‐oxybis[benzenamine] or 4,4′‐methylenebis[benzenamine] as diamine 2, coumarin‐3‐carboxylic acid (=2‐oxo‐2H‐benzopyran‐3‐carboxylic acid; 3), and alkyl isocyanides 4 lead to the desired
该新型香豆素-3-羧酰胺(= 2-氧代-2- ħ -1-苯并吡喃-3-羧酰胺)5A - 5克含有亲脂性间隔物通过将合成的Ugi -四组分反应(方案1)。芳香醛的反应中1作为二胺,4,4'-氧代双[苯胺]或4,4'-亚甲基双[苯胺] 2,香豆素-3-羧酸(= 2-氧代-2- ħ苯并吡喃-3-羧酸酸;3)和烷基异氰化物4生成所需的取代的香豆素-3-羧酰胺5a – 5g在室温下具有很高的成键效率。这些新颖的香豆素衍生物在CHCl 3中在544 nm处显示出出色的荧光。