Pyridine-2-carboxylic acid mediated oxidation of α-hydroxy acids with pyridinium dichromate

被引：0
作者：
Sundari, V [1 ]
Meenakshisundaram, S [1 ]
Vasuki, C [1 ]
机构：
[1] Annamalai Univ, Dept Chem, Annamalainagar 608002, Tamil Nadu, India
来源：
OXIDATION COMMUNICATIONS | 1999年 / 22卷 / 03期
关键词：
kinetics; oxidation; picolinic acid; alpha-hydroxy acids;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The kinetics of oxidation of some alpha-hydroxyacids (mandelic, lactic and glycolic acids) with pyridinium dichromate (PDC) in the presence of pyridine-2-carboxylic acid [PA] has been studied in perchloric acid medium. PA enhances the rate of oxidation in the case of lactic acid (LA) and mandelic acid (MA). Kinetic solvent isotope effect studies (k(D2O)/k(H2O) greater than or equal to 1) imply a proton catalyzed reaction. Enhanced reactivity is explained by assuming the formation of a termolecular complex. Catalytic activity of PA is significant in the case of mandelic acid. By the way in glycolic acid (GA) oxidation the inverse dependence of the rate on [PA] is noted. At constant [H+] the reaction seems to follow the rate law, k(obs) = k(4)K(3)K(2)K(a)'[S][PAH(+)]/[PA](T) in glycolic acid.
引用
收藏
页码：400 / 405
页数：6
相关论文
共 50 条
  • [1] Kinetics and mechanism of oxidation of α-hydroxy acids by quinolinium dichromate
    Nalwaya, N
    Jain, R
    Hiran, BL
    OXIDATION COMMUNICATIONS, 2003, 26 (04): : 561 - 566
  • [2] REACTIVITY IN THE NICOTINIUM DICHROMATE OXIDATION OF SOME α-HYDROXY ACIDS
    Sekar, K. G.
    Lakshmanan, K.
    OXIDATION COMMUNICATIONS, 2013, 36 (02): : 361 - 366
  • [3] Experimental and computational studies of 4-(Trifluoromethyl)pyridine-2-carboxylic acid
    Vural, Hatice
    JOURNAL OF MOLECULAR STRUCTURE, 2016, 1111 : 55 - 60
  • [4] Ternary Complexes of Cd(II) Involving Pyridine-2-carboxylic Acid and Biorelevant Ligands
    Shoukry, Eman M.
    Hosny, Nagda G.
    Amin, Mona F.
    Mohamed, Eman F.
    EGYPTIAN JOURNAL OF CHEMISTRY, 2016, 59 (05): : 673 - 686
  • [5] Mechanism of Alkene, Alkane, and Alcohol Oxidation with H2O2 by an in Situ Prepared MnII/Pyridine-2-carboxylic Acid Catalyst
    Saisaha, Pattama
    Dong, Jia Jia
    Meinds, Tim G.
    de Boer, Johannes W.
    Hage, Ronald
    Mecozzi, Francesco
    Kasper, Johann B.
    Browne, Wesley R.
    ACS CATALYSIS, 2016, 6 (06): : 3486 - 3495
  • [6] Separation and direct UV detection of lanthanides complexed with pyridine-2-carboxylic acid by capillary electrophoresis
    Öztekin, N
    Erim, FB
    JOURNAL OF CHROMATOGRAPHY A, 2001, 924 (1-2) : 541 - 546
  • [7] Equilibrium and kinetic investigation of reactive extraction of pyridine-2-carboxylic acid using corn oil as diluent
    Khonde, Ruta D.
    Shivramwar, Mayuresh V.
    BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2024,
  • [8] Oxidation of some unsaturated acids by tetrakis (pyridine) silver dichromate : A kinetic and mechanistic study
    Choudhary, A.
    Yajurvedi, D.
    Kumbhani, S.
    Shastri, I.
    Sharma, Vinita
    JOURNAL OF THE INDIAN CHEMICAL SOCIETY, 2009, 86 (08) : 832 - 836
  • [9] Oxidation of Some α-Hydroxy Acids by Pyridinium Fluorochromate in Aqueous Acetic Acid Media-A Kinetic and Mechanistic Study
    Ahmed, S. Zaheer
    Shafi, S. Syed
    Mansoor, S. Sheik
    ASIAN JOURNAL OF CHEMISTRY, 2013, 25 (02) : 921 - 925
  • [10] Pyridinium dichromate oxidations. studies on the kinetics and substituent effect in the oxidation of aniline in acid medium
    Palaniappan, A
    Sekar, KG
    OXIDATION COMMUNICATIONS, 2004, 27 (02): : 367 - 374
12345