A homogeneous redox catalytic process for the paired synthesis of l-cysteine and l-cysteic acid from l-cystine
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
A homogeneous redox catalytic process for the paired synthesis of l-cysteine and l-cysteic acid from l-cystine
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| Creator |
Firozbabu, K.
Sivasubramanian, R. Noel, M. Anbukulandainathan, M. |
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| Subject |
Electroorganic
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| Description |
Redox catalytic process involved in the paired electrosynthesis of l-cysteine and l-cysteic acid from
l-cystine is investigated by cyclic voltammetric technique and also confirmed by preparative electrolysis. The cyclic voltammetric behaviour shows that in the catholyte, in situ deposited tin (Sn) surface acts as a redox catalyst for the electro-reduction of l-cystine to l-cysteine whereas in the anolyte, the electro-generated bromine acts as a homogeneous redox mediator to enhance the electro-oxidation of
l-cystine. l-Cysteine hydrochloride monohydrate (l-cysteine) and l-cysteic acid are prepared from lcystine by preparative electrolysis with high purity and high yield using graphite cathode and DSA anode. At optimum concentration of l-cystine with 1:1 concentration ratio (catholyte:anolyte), the material yield obtained for l-cysteine is above 80% and that for l-cysteic acid is close to 60% in the paired electrosynthesis process in the batch operation. Scope for further experiments in conversion efficiency is also discussed
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| Publisher |
Elsevier
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| Date |
2011
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/2889/1/029-2011.pdf
Firozbabu, K. and Sivasubramanian, R. and Noel, M. and Anbukulandainathan, M. (2011) A homogeneous redox catalytic process for the paired synthesis of l-cysteine and l-cysteic acid from l-cystine. Electrochimica Acta, 56 (27). pp. 9797-9801. ISSN 0013-4686 |
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| Relation |
http://cecri.csircentral.net/2889/
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