Kröhnke condensation of several cycloimmonium salts with p-dimethylaminobenzaldhyde has been studied. X-Ray diffraction, IR and Raman spectra, 1H-and 13C-NMR and UV spectra of the products are discussed, being compared, when necessary, with the starting pyridinium salts. All compounds showed the Z configuration, corresponding to the more stable structure, except one, in which steric factors were predominant
Synthesis of chromeno[2′,3′:4,5]imidazo[2,1-a]isoquinolines via a novel domino reaction of isoquinoline-derived immonium salts. Scope and limitations
作者:Leonid G. Voskressensky、Alexey A. Festa、Ekaterina A. Sokolova、Alexey V. Varlamov
DOI:10.1016/j.tet.2012.04.087
日期:2012.7
A one-pot protocol towards chromeno[2′,2′:4,5]imidazo[2,1-a]isoquinoline derivatives via a domino reaction of isoquinoline-derived immonium salts and α-hydroxy aromatic aldehydes is elaborated. The scope and limitations of this reaction is discussed.
阐述了通过异喹啉衍生的铵盐与α-羟基芳香醛的多米诺反应,对一铬基[2',2':4,5]咪唑并[2,1- a ]异喹啉衍生物的一锅法方案。讨论了该反应的范围和局限性。
spiro[indoline-3,8'-isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinolines] in good yields and with high diastereoselectivity. When 4-arylidenepyrazol-3-ones, 2-arylidene-1,3-indanediones and arylidenemalononitriles were employed in the reaction, the corresponding spiro[isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline-8,4'-pyrazole], spiro[indene-2,8'-isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline], and isoxazolo[5,4-c]pyrrolo[2,1-a]isoquinoline
作者:Leonid G. Voskressensky、Larisa N. Kulikova、Anna V. Listratova、Roman S. Borisov、Muhamadsho A. Kukaniev、Alexey V. Varlamov
DOI:10.1016/j.tetlet.2010.02.102
日期:2010.4
A one-pot protocol toward previously unreported derivatives of chromeno[2′,2′:4,5]imidazo[2,1-a]isoquinoline via a cascade reaction of isoquinoline-derived immonium salts and α-hydroxy aromatic aldehydes is elaborated.
通过异喹啉衍生的铵盐和α-羟基芳族醛的级联反应,针对一向未报道的铬诺[2',2':4,5]咪唑并[2,1- a ]异喹啉衍生物进行了一锅操作。
A novel domino condensation–intramolecular nucleophilic cyclization approach towards annulated thiochromenes
作者:Leonid G. Voskressensky、Ekaterina A. Sokolova、Alexey A. Festa、Alexey V. Varlamov
DOI:10.1016/j.tetlet.2013.07.040
日期:2013.9
A one-pot protocol towards previously unreported derivatives of thiochromeno [2',3':4,5] imidazo[2,1-a]isoquinoline via a domino reaction of isoquinoline-derived iminium salts and alpha-mercapto benzaldehydes is elaborated. (C) 2013 Elsevier Ltd. All rights reserved.