56029-18-6Relevant articles and documents
Spectroscopic studies of the intramolecular hydrogen bonding in o-hydroxy Schiff bases, derived from diaminomaleonitrile, and their deprotonation reaction products
Szady-Che?mieniecka, Anna,Ko?odziej, Beata,Morawiak, Maja,Kamieński, Bohdan,Schilf, Wojciech
, p. 330 - 341 (2017/08/23)
The structural study of five Schiff bases derived from diaminomaleonitrile (DAMN) and 2-hydroxy carbonyl compounds was performed using 1H, 13C and 15N NMR methods in solution and in the solid state as well. ATR-FTIR and X-Ray spectroscopies were used for confirmation of the results obtained by NMR method. The imine obtained from DAMN and benzaldehyde was synthesized as a model compound which lacks intramolecular hydrogen bond. Deprotonation of all synthesized compounds was done by treating with tetramethylguanidine (TMG). NMR data revealed that salicylidene Schiff bases in DMSO solution exist as OH forms without intramolecular hydrogen bonds and independent on the substituents in aromatic ring. In the case of 2-hydroxy naphthyl derivative, the OH proton is engaged into weak intramolecular hydrogen bond. Two of imines (salDAMN and 5-BrsalDAMN) exist in DMSO solution as equilibrium mixtures of two isomers (A and B). The structures of equilibrium mixture in the solid state have been studied by NMR, ATR-FTIR and X-Ray methods. The deprotonation of three studied compounds (salDAMN, 5-BrsalDAMN, and 5-CH3salDAMN) proceeded in two different ways: deprotonation of oxygen atom (X form) or of nitrogen atom of free primary amine group of DAMN moiety (Y form). For 5-NO2salDAMN and naphDAMN only one form (X) was observed.
Cellulose-SO3H as a biodegradable solid acid catalyzed one-pot three-component Ugi reaction: Synthesis of α-amino amide, 3,4-dihydroquinoxalin-2-amine, 4H-benzo[b][1,4]thiazin-2-amine and 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives
Mofakham, Hamid,Hezarkhani, Zeinab,Shaabani, Ahmad
scheme or table, p. 26 - 34 (2012/08/13)
A variety of amines has become utilized in the three-compound Ugi reaction and synthesis of 3,4-dihydroquinoxalin-2-amine, 4H-benzo[b][1,4]thiazin-2-amine and 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives in the presence of cellulose sulfuric acid as
Synthesis and Tritium Radiolabelling of Fluorinated Analogues of myo-Inositol
Offer, John L.,Voorheis, H. Paul,Metcalfe, James C.,Smith, Gerry A.
, p. 953 - 960 (2007/10/02)
Syntheses have been developed for a set of six myo-inositol analogues from myo-inositol in which single hydroxy groups have been replaced by fluorine (monodeoxy-fluoro-myo-inositols).Except for 2-deoxy-2-fluoro-myo-inositol 32 and 1D-4-deoxy-4-fluoro-myo-