Diels-alder reactions of pyrano[3,4-b]indol-3-ones with substituted alkenes : synthesis of 1,2-dihydrocarbazoles - part II
作者:P. Van Doren、F. Compernolle、G. Hoornaert
DOI:10.1016/s0040-4020(01)90537-x
日期:1990.1
The Diels-Alder reaction of pyrano[3,4-b]indol-3-ones 1 with trisubstituted dienophiles 2 yields stable 1,2-dihydrocarbazoles 4. Electronic and steric factors, together with a gradual change in mechanism from a concerted to a more stepwise reaction, are invoked to explain the regiochemical distribution of products.
One-pot efficient synthesis of novel fused pentacyclic indolopyridobenzimidazoles and pyridoimidazopyridoindoles from the reaction of pyranoindolones with 1,2-diaminobenzenes and 2,3-diaminopyridines
作者:Despina Livadiotou、Anna Maria Fadel、Constantinos A. Tsoleridis、Julia Stephanidou-Stephanatou
DOI:10.1016/j.tet.2012.03.101
日期:2012.6
The synthesis of a number of novel, fully conjugated, planar pentacyclic 5H-indolo[3′,2′:4,5]pyrido[1,2-a][1,3]benzimidazoles (8) and 11H-pyrido[3″,2″:4′,5′]imidazo[1′,2′:1,6]pyrido[3,4-b]indoles (12) by a one-pot reaction of pyranoindolones with substituted o-phenylenediamines or 2,3-diaminopyridines is described. In the case of 2,3-diaminopyridines the reaction proceeds regioselectively affording
合成许多新颖的,完全共轭的平面五环5 H-吲哚并[3',2':4,5]吡啶[1,2- a ] [1,3]苯并咪唑(8)和11 H-吡啶通过吡喃并吲哚酮与取代的邻苯二胺的一锅反应,使[3″,2″:4′,5′]咪唑并[3,4- b ]吲哚(12)或2,3-二氨基吡啶被描述。在2,3-二氨基吡啶的情况下,反应进行区域选择性,仅提供区域异构体12。新化合物的结构分配以及1 H和 13 C NMR信号的完整分配是基于对它们的11 H和13 C NMR(1D和2D),IR,MS和元素分析数据。提出了合理的机制。
One-pot reaction of pyranoindolones with phenylisocyanates: a simple and regioselective approach to β-carbolines
作者:Despina Livadiotou、Dimitra Hatzimimikou、Dimitra Tsitsi、Vassilios Tsiaras、Evanthia Samatidou、Constantinos G. Neochoritis
DOI:10.1016/j.tetlet.2016.10.075
日期:2016.12
A versatile, regioselective and novel approach towards 2-aryl-β-carbolin-3-ones from the reaction of pyranoindolones with phenylisocyanates is described.
The synthesis of a number of 2-anilino- and 2-(benzoylamino)-β -carbolin-3-ones in good yields by a one-step sequence from the reaction of pyranoindolones with phenylhydrazine or benzoylhydrazine is described; the observed good regioselectivity of the reaction is discussed. Full assignment of all 'H and 13 C NMR chemical shifts has been unambiguously achieved.
描述了通过吡喃吲哚酮与苯肼或苯甲酰肼反应的一步顺序以良好收率合成许多 2-苯胺基-和 2-(苯甲酰氨基)-β-咔啉-3-酮;讨论了观察到的反应良好的区域选择性。已经明确实现了所有 'H 和 13 C NMR 化学位移的完全分配。
One-Step Synthesis of [1,2]Diazepino[4,5-<i>b</i>]indole Derivatives from the Reaction
of Pyranoindolones with Methylhydrazine
The synthesis of a number of [1,2]diazepino[4,5-b]indoles in good yields by a one-step sequence from the reaction of pyranoindolones with methylhydrazine is described. The observed regioselectivity of the reaction is explained considering several reaction paths.