Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1998-12-03
2000-06-20
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562556, 562557, C07C22740, C07C22714
Patent
active
060779713
ABSTRACT:
Disclosed is a method for purifying homocystine comprising treating crude homocystine with a base, a method for purifying homocystine comprising recovering homocystine by neutralizing an alkaline aqueous solution of crude homocystine with an acid, and a homocystine powder containing 1,000 ppm or less of a polysulfide.
REFERENCES:
patent: 4550199 (1985-10-01), Karrenbauer et al.
Miyazaki, H. Preparations of Optically Active Homocysteine and Homocystine by Asymmetric Transformation or (RS)-1,3-Thiazane-4-carboxylic Acid Bull. Chem. Soc. Jpn. vol. 66 No. 2 pp 536-540, 1993.
Lipton, S.H. "Peroxide Oxidation Products of Homocystine and Lanthionine" J. Agric. Food Chem. vol. 26 No. 6 pp 1406-1409, 1976.
Butz, L. W. et al "The Formation of a Homologue of Cystine by the Decomposition of Methionine with Sulfuric Acid" J. Biol. Chem. vol. 99 pp 135-142, 1993.
Ichikawa Shuji
Iwane Hiroshi
Ryutou Hirotaka
Sugimoto Kenichi
Takehara Jun
Geist Gary
Maier Leigh C.
Mitsubishi Chemical Corporation
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