Heterocyclen-Synthesen mit Monothiomalonsäure-Amiden: Synthese von 3-Oxo-2,3-dihydroisothiazolo [5,4-b] pyridinen und 3-Oxo-2,3-dihydroisothiazolo[5,4-d]pyrimidinen
Reactions of malonthioamides and malonamidines with methyl acetylpyruvate as a one-step method to prepare 4-thio- and 4-aminopyrrolo[3,4-c]pyridines
作者:Vera S. Berseneva、Vasiliy A. Bakulev、Wim Dehaen、Suzanne Toppet、Marina Borovkova
DOI:10.1016/j.tet.2007.03.054
日期:2007.5
We report an efficient one-step approach to 4-thio and 4-aminopyrrolo[3,4-c]pyridines based on the selective reaction of malonthioamides and malonamidines with methyl acetylpyruvate. Structural proof is given by HMBC and HMQC spectra. A cascade heterocyclization mechanism is proposed for the reactions studied. (C) 2007 Elsevier Ltd. All rights reserved.
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作者:Yu. Yu. Morzherin、M. F. Kosterina、V. S. Berseneva、W. Dehaen、V. A. Bakulev
DOI:10.1023/a:1020912932335
日期:——
The equilibrium concentrations of E- and Z-isomers of thiazolidin-4-ones containing exocyclic double bonds in positions 2 and 5 of the cycle were determined in DMSO-d(6). The influence of the nature of the substituents on the equilibrium position was found. Electron-releasing substituents stabilize the E, Z-configuration and electron-withdrawing substituents stabilize the Z,Z-configuration. The association constants of E- and Z-2-ethoxycarbonyl-methylenethiazolidin-4-ones with the sodium cation were determined by H-1 NMR spectroscopy.
SCHAPER, W., SYNTHESIS, BRD, 1985, N 9, 861-867
作者:SCHAPER, W.
DOI:——
日期:——
SASSE K., J. LIEBIGS ANN. CHEM. <JLAC-BF>, 1976, NO 4, 768-780
作者:SASSE K.
DOI:——
日期:——
DANKOVA, E. F.;BAKULEV, V. A.;KOLOBOV, M. YU.;SHISHKINA, V. I.;YASMAN, YA+, XIMIYA GETEROTSIKL. SOED.,(1988) N 9, S. 1269-1273
作者:DANKOVA, E. F.、BAKULEV, V. A.、KOLOBOV, M. YU.、SHISHKINA, V. I.、YASMAN, YA+