1186-70-5Relevant articles and documents
1H Nuclear Magnetic Resonance Study of the Kinetics of the Reaction of N,N-Dialkylformamide Dimethyl Acetals with Secondary Amines
Wawer, Iwona,Osek, Jerzy
, p. 993 - 996 (1988)
Rate constants and activation parameters (ΔG, ΔH, ΔS) for the reactions of N,N-dialkylformamide dimethyl acetals with four secondary amines have been estimated by 1H n.m.r. spectroscopy.The reactions are reversible and obey a second-order kinetic equation.Substitution of one methoxy group of the amide acetal by the amine entity is found to give ester aminals which are subject to decomposition (ΔG 92-103 kJ mol-1).A transamination reaction yields a new amide acetal at higher temperatures (ΔG 115 kJ mol-1).On the basis of the kinetic data, the mechanism of these reactions is discussed.
Preparation of 1-nitroanthraquinone-2-carboxylic acid
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, (2008/06/13)
1-Nitroanthraquinone-2-carboxylic acid of the formula I STR1 is prepared by treating novel 2-substituted 1-nitroanthraquinones of the general formula II STR2 where R is --CH=CH--R1 or --CH2 --CHO, where R1 is C1 -C5 -dialkylamino or a cyclic 5- or 6-membered amine which may contain further hetero atoms, with oxidizing agents free of heavy metal.
1H and 13C Nuclear Magnetic Resonance Identification of the Products of the Reaction of NN-Dialkylformamide Dimethyl Acetals with Secondary Amines
Wawer, Iwona,Osek, Jerzy
, p. 1669 - 1672 (2007/10/02)
Eight reactions of NN-dialkylformamide dimethyl acetals with secondary amines have been followed by means of 1H n.m.r.The reaction products were not only other amide acetals but also ester aminals and orthoamides.Therefore secondary amines exchanged the amine moiety and the methoxy group of the amide acetal.The relative concentrations of products at equilibrium have been estimated.The 13C chemical shifts for substrates and some products have been reported.