were synthesized in good yields. A one-pot reaction between 2-naphthol and furan-2,5-dicarbaldehyde led to the formation of the corresponding dibenzoxanthene derivative. The latter underwent Knoevenagel condensation with a variety of methylene active derivatives to afford the corresponding 5-(14H-dibenzo[a,j]xanthen-14-yl)furan-2-carbaldehydes. Knoevenagel condensation was also applied to synthesize
摘要 以良好的产率合成了两个新系列的 5-(14 H-二苯并[ a,j ]xanthen-14-yl)
呋喃-2-甲醛和α-
氰基
芪。
2-萘酚和
呋喃-2,5-二
甲醛之间的一锅反应导致形成相应的二苯并呫吨衍
生物。后者与多种亚甲基活性衍
生物进行 Knoevenagel 缩合,得到相应的 5-(14 H-二苯并[ a,j ]xanthen-14-基)
呋喃-2-甲醛。还采用Knoevenagel缩合法,以4-硝基
苯乙腈为起始衍
生物,与等摩尔量的不同醛反应,合成了一系列带有多种吸电子和给电子基团的α-
氰基
芪。