A series of new push-pull compounds were synthesised by reaction of 5-aryl- furan-2-carboxaldehydes and furo[b]pyrrole type aldehydes with benzothiazolium salts. These newcondensationproducts represent highly conjugated systems that have potential biological activity. The reaction of furo[b]pyrrole type aldehydes with benzothiazolium salts give potential precursors of cyaninedyes.
Reaction of Substituted Furan-2-carboxaldehydes and Furo[b]pyrrole Type Aldehydes with Hippuric Acid
作者:Zita Puterová、Heinz Sterk、Alžbeta Krutošíková
DOI:10.3390/90100011
日期:——
3-oxazol-5(4H)-ones were prepared by reactions of hippuric acid with substituted furan-2-carboxaldehydes or furo[b]pyrroletype aldehydes. The reactivity of various furan-2-carboxaldehyde derivatives in this reaction is discussed. The effect of microwave irradiation on some condensation reactions was compared with "classical" conditions. The results show that microwave irradiation shortens the reaction
4-杂亚芳基-2-苯基-1,3-恶唑-5(4H)-酮是通过马尿酸与取代的呋喃-2-甲醛或呋喃[b]吡咯型醛反应制备的。讨论了该反应中各种呋喃-2-甲醛衍生物的反应性。将微波辐射对某些缩合反应的影响与“经典”条件进行了比较。结果表明,微波辐射缩短了反应时间,同时提供了相当的产率。元素分析、UV、IR 和 1D NMR 证明了新合成化合物的结构。2D NMR 光谱测量证实碳-碳双键处的构型对应于产物的纯 E 异构体。
Dandia, Anshu; Indora, Aayushi; Parewa, Vijay, Indian Journal of Heterocyclic Chemistry, 2018, vol. 28, # 1, p. 103 - 112
作者:Dandia, Anshu、Indora, Aayushi、Parewa, Vijay、Rathore, Kuldeep S.
DOI:——
日期:——
Condensed O-, N-heterocycles by the transformation of azidoacrylates
A number of furo[3,2-c]pyridines (4 a-4 d) and benzo[b]derivative (4e), as well as pyrrolo[2',3'-4,5]furo[3,2-c]pyridine (8) were prepared by reaction of the corresponding iminophosphoranes, available from ethyl azidoheteroacrylates and triphenylphosphine, with phenyl isocyanate. The appropriate azidoheteroacrylates were used for the preparation of some substituted furo[3,2-b:4,5-b]dipyrroles (6). The reactions of the prepared compounds are described.
SOROTSKAYA, L. N.;BADOVSKAYA, L. A.;KAKLYUGINA, T. YA.;BELENKIJ, L. I.;IG+, ZH. ORGAN. XIMII, 25,(1989) N, S. 175-182
作者:SOROTSKAYA, L. N.、BADOVSKAYA, L. A.、KAKLYUGINA, T. YA.、BELENKIJ, L. I.、IG+