3987-53-9Relevant articles and documents
Substance related with tophatib and preparation method and application thereof
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, (2019/01/08)
The invention discloses a substance related with tophatib and a preparation method and application thereof. The substance is named as N,N'-diacetyl{(3R,4R)-4-methyl-3-[methyl(7H-pyrrole[2,3-D]pyrimidine-4-yl)amine]piperidine-1-yl}imine. The impurity is characterized in that the generation level is lower in the condensation reaction process; however, the impurity has the uniform main functional groups with the tophatib, the cleaning effect is limited in the subsequent salting and refining process, and the influence to the qualities of crude drug and finished product of tophatib is larger; by detecting the existence of the impurity, the qualities of the raw material and preparation of the tophatib can be effectively determined.
Nickel(II) complexes with N-aralkyliminodiacetic acids: Preparation, spectroscopic, structural and thermal characterization
Smre?ki, Neven,Kukovec, Boris-Marko,Dakovi?, Marijana,Popovi?, Zora
, p. 122 - 129 (2013/07/25)
The reactions of N-aralkyl derivatives of iminodiacetic acid (H 2Bnida, H2Peida, H2Ppida, o-H2Cbida, Bn = benzyl, Pe = 2-phenylethyl, Pp = 3-phenylprop-1-yl, o-Cb = o-chlorobenzyl) with nickel(II) chloride hexahydrate or nickel(II) acetate tetrahydrate in aqueous solutions were studied. Five new nickel(II) complexes [Ni(Bnida)(H 2O)3]·H2O (1), [Ni(Peida)(H 2O)3] (2), [Ni(Ppida)(H2O)3] ·H2O (3a), [Ni(Ppida)(H2O)3] (3b) and [Ni(o-Cbida)(H2O)3] (4) were prepared and characterized by infrared spectroscopy and thermal analysis (TGA-DTA). The crystal structures of 1 and 3b were determined by single-crystal X-ray structural analysis. The octahedral coordination environment around the nickel(II) ion in 1 and 3b consists of an O,N,O′-tridentate N-aralkyliminodiacetate ion and three water molecules arranged in a fac-position. The molecules in the crystal structures of 1 and 3b are connected into a complicated hydrogen-bonded 2D network, dominated by the O-H?O hydrogen bonds. These 2D networks are in turn assembled into a 3D architecture only by weak van der Waals interactions.
RAPID DEBENZYLATION OF N-BENZYLAMINO DERIVATIVES TO AMINO-DERIVATIVES USING AMMONIUM FORMATE AS CATALYTIC HYDROGEN TRANSFER AGENT
Ram, Siya,Spicer, Leonard D.
, p. 515 - 516 (2007/10/02)
Various N-benzyl derivatives of amino acids and amines were deprotected to the corresponding free amino acids and amines using ammonium formate as the hydrogen source.