(5-Bromo-2-furyl)methylidenemalonodinitrile (1) reacted with substituted aromatic amines under formation of (5-N-arylamino-2-furyl)methylidenemalonodinitriles 2a-2h whereas no reaction was observed with N-alkyl-N-phenylamines. Derivatives of 2-cyano-3-(5-N-alkyl-N-phenylamino-2-furyl)- propenoic acid 5a-5o were prepared by reaction of the corresponding N-alkylanilines with 5-bromo-2-furancarbaldehyde, followed by hydrolysis of the obtained Eiji salts and reaction with malonic acid derivatives.
(5-溴-2-呋喃基)甲基亚甲基丙二腈(1)与取代芳香胺反应,形成(5-N-芳基氨基-2-呋喃基)甲基亚甲基丙二腈2a-2h,而与N-烷基-N-苯胺没有观察到反应。通过对应的N-烷基苯胺与5-溴-2-呋喃甲醛反应,得到Eiji盐水解后与丙二酸衍生物反应,制备了2-氰基-3-(5-N-烷基-N-苯氨基-2-呋喃基)-丙烯酸衍生物5a-5o。