Reaction of 2-Chloro-1-alkyl-1H-Indol-3-carbaldehydes with Barbituric Acids and 5-Methyl-2-phenyl-2,4-dihydropyrazol-3-one. Formation of Compound with Extremely Short Intramolecular Hydrogen Bond in Eight-Membered Pseudocycle
摘要:
New indolin-2-one derivatives, containing in its molecules eight-membered pseudo-cycle with unusually short intramolecular hydrogen bond in OHO-bridge have been synthesized by reaction of 2-chloro-1-alkyl-1H-indole-3-carbaldehyde with barbituric acids or 5-methyl-2-phenyl-2,4-dihydropyrazol-3-one. Under the action of amines they undergo fragmentation to 5-aminomethylenebarbituric acids or 4-aminomethylenepyrazolones and 1-alkyl-1,3-dihydroindo1-2-ones.
N,N-Dimethylformamide-Promoted Reaction of Isocyanides and Barbituric acids: An Easy Synthesis of 5-[(Alkyl or Arylamino)Methylene]Barbituric Acids
作者:Mohammad Bagher Teimouri、Ahmad Tayyebi
DOI:10.3184/030823410x12682371167951
日期:2010.3
the reaction of alkyl or arylisocyanides with barbituricacid derivatives which led to 5-[(alkyl or arylamino)methylene]barbituricacids in good yields at room temperature. The workup of reactions was very simple and the crude products were sufficiently pure to be used without further purification. This procedure provides an alternative method for the synthesis of aminomethylenebarbituric acids.
wide spectrum of 5-aminomethylene barbituric/ thiobarbituric acidderivatives was synthesized and evaluated for their Jack bean urease inhibitory activity. Methods: Among the synthesized compounds, 5-cyclohexylaminomethylene barbituricacid (3a) showed the most potent activity (IC50 = 25.8 µM), 4 times more potent than hydroxyurea (IC50 = 100.0 µM) and a similar activity to thiourea (IC50 = 22.0 µM), both