scholarly journals Spectrophotometric study of the charge transfer complexation of some amino acid derivative drugs as electron donors with 7,7,8,8-tetracyanoquinodimethane

2010 ◽  
Vol 24 (1) ◽  
Author(s):  
Sheng Yun Li ◽  
Qiao Lin Guo ◽  
Wen Yuan ◽  
Yu Cui Hou ◽  
Li Ming Du
Keyword(s):  
Charge Transfer ◽  
Amino Acid ◽  
Acid Derivative ◽  
Spectrophotometric Study ◽  
Electron Donors ◽  
Amino Acid Derivative ◽  
Charge Transfer Complexation

Synthesis of amino acid derivative Schiff base copper(II) complexes by microwave and wet mechanochemical methods

2021 ◽  
Vol 98 (1) ◽  
pp. 100004
Author(s):  
Nao Otani ◽  
Tetsundo Furuya ◽  
Natsuki Katsuumi ◽  
Tomoyuki Haraguchi ◽  
Takashiro Akitsu
Keyword(s):  
Schiff Base ◽  
Amino Acid ◽  
Acid Derivative ◽  
Amino Acid Derivative

Resolution of racemic mixture of α-amino acid derivative through composite membrane

2011 ◽  
Vol 378 (1-2) ◽  
pp. 531-540 ◽  
Author(s):  
Kripal Singh ◽  
Pravin G. Ingole ◽  
Jayesh Chaudhari ◽  
Harshad Bhrambhatt ◽  
Amit Bhattacharya ◽  
...  
Keyword(s):  
Amino Acid ◽  
Acid Derivative ◽  
Composite Membrane ◽  
Amino Acid Derivative ◽  
Racemic Mixture

Asymmetric Synthesis of an Amino Acid Derivative from Achiral Aroyl Acrylamide by Reversible Michael Addition and Preferential Crystallization

2016 ◽  
Vol 22 (46) ◽  
pp. 16429-16432 ◽  
Author(s):  
Yuki Kaji ◽  
Naohiro Uemura ◽  
Yoshio Kasashima ◽  
Hiroki Ishikawa ◽  
Yasushi Yoshida ◽  
...  
Keyword(s):  
Amino Acid ◽  
Asymmetric Synthesis ◽  
Acid Derivative ◽  
Michael Addition ◽  
Amino Acid Derivative

scholarly journals Liposomes Can Achieve Enantioselective C–C Bond Formation of an α-Amino Acid Derivative in Aqueous Media

ACS Omega ◽  
2017 ◽  
Vol 2 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Fumihiko Iwasaki ◽  
Keishi Suga ◽  
Yukihiro Okamoto ◽  
Hiroshi Umakoshi
Keyword(s):  
Amino Acid ◽  
Acid Derivative ◽  
Bond Formation ◽  
Aqueous Media ◽  
Amino Acid Derivative

Spontaneous symmetry breaking during interrupted crystallization of an axially chiral amino acid derivative

2010 ◽  
Vol 46 (12) ◽  
pp. 2094 ◽  
Author(s):  
Mark A. Sephton ◽  
Christopher R. Emerson ◽  
Lev N. Zakharov ◽  
Paul R. Blakemore
Keyword(s):  
Amino Acid ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Acid Derivative ◽  
Amino Acid Derivative ◽  
Axially Chiral

scholarly journals Spectrophotometric Determination of Three Anti-Ulcer Drugs Through Charge-Transfer Complexation

2002 ◽  
Vol 85 (5) ◽  
pp. 1003-1008 ◽  
Author(s):  
Sheikha Al-Ghannam ◽  
Fathalla Belal
Keyword(s):  
Free Energy ◽  
Charge Transfer ◽  
Stability Constants ◽  
Pharmaceutical Preparations ◽  
Correlation Coefficients ◽  
Spectrophotometric Assay ◽  
Electron Donors ◽  
Radical Anions ◽  
Charge Transfer Complexation

Abstract A simple charge-transfer complexation method is described for the spectrophotometric assay of nizatidine, ranitidine, and famotidine. This method is based on interaction of these drugs, as n-electron donors, with 7,7,8,8-tetracyanoquinodimethane, as the π-acceptor, in acetonitrile to give highly colored green radical anions that are measured at 840 nm. Calibration graphs for the 3 compounds are linear over the concentration ranges of 1–6 μg/mL for nizatidine and ranitidine and 1–7 μg/mL for famotidine, with correlation coefficients (n = 6) of >0.999. The conditioned stability constants and the free energy changes were measured; the values obtained were generally high and negative, respectively, suggesting highly stable complexes. The proposed method was successfully applied to the determination of the drugs in pharmaceutical preparations. The assay results were in accordance with those obtained by using reference methods.

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