Reactions of 1-(3-aryl-3-oxopropenyl)azulenes and 1-cinnamoylazulenes with malononitrile: Synthesis of 1-(2-aryl-4-pyridyl)azulenes and 1-(4-aryl-2-pyridyl)azulenes
作者:Dao-Lin Wang、Kimiaki Imafuku
DOI:10.1002/jhet.5570370501
日期:2000.9
The reactions of 1-formyl-3-methoxycarbonylazulene (1) with acetophenones 3a-e gave 1-(3-aryl-3-oxopropenyl)-3-methoxycarbonylazulenes 4a-e which reacted with malononitrile in the presence of sodium methoxide to afford 1-(2-aryl-4-pyridyl)-3-methoxycarbonylazulenes 9a-d, except for 4′-nitro-substituted compounds. Heating of the compounds 9a-d in 100% phosphoric acid yielded 1-(2-aryl-4-pyridyl)azulenes
1-甲酰基-3-甲氧基羰基azulene (1)与苯乙酮3a-e的反应得到1-(3-芳基-3-氧代丙烯基)-3-甲氧基羰基azulenes 4a-e在甲醇钠的存在下与丙二腈反应得到1 -(2-芳基-4-吡啶基)-3-甲氧基羰基azulenes 9a-d,除了4'-硝基取代的化合物。将化合物9a-d在100%磷酸中加热,得到1-(2-芳基-4-吡啶基)azulenes 10a-d。1-(4-芳基-2-吡啶基)azulenes 12a-1和1- [4-(2-呋喃基)-和4-(2-噻吩基)-2-吡啶基)] azulenes 14a,b获得了。