Process for the production of high purity S-carboxymethyl-L-cyst

Details Process for the production of high purity S-carboxymethyl-L-cyst Process for the production of high purity S-carboxymethyl-L-cyst

1977-09-14

1978-12-12

Thomas, Jr., James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

560153, C07C10120

Patent

active

041295935

ABSTRACT:
Very pure S-carboxymethyl-L-cysteine is prepared by reacting L-cystine in liquid ammonia with metallic sodium to form the disodium salt of L-cysteine, evaporating the ammonia, reacting the disodium salt of L-cysteine with an aqueous solution of chloroacetic acid and precipitating the S-carboxymethyl-L-cysteine formed by acidifying the reaction mixture. There is employed 0.1 to 10 weight percent of a reducing agent based on the chloroacetic acid.

REFERENCES:
patent: 2460785 (1949-02-01), Pierson et al.
patent: 3184505 (1965-05-01), Martin et al.
Berezovskii, V. M. et al. "Synthesis of Substituted 3-Ketothiophanes by Dieckmann Cyclization" J. Gen. Chem. U.S.S.R. (1963) pp. 2815-2820.
Greenstein, Jessie P. et al. "Chemistry of the Amino Acids" vol. 3 (1961) p. 1901, Wiley Publ.
Mellor, J. W. "Inorganic and Theoretical Chemistry", vol. 10 (1949) p. 171, Longmans, Green & Co. Publ.
Kirk-Othmer "Encyclopedia of Chemical Technology" 2nd Ed. vol. 10, pp. 100 and 102, Interscience Publ.

Affiliated with

Also associated with

Rating

Process for the production of high purity S-carboxymethyl-L-cyst does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of high purity S-carboxymethyl-L-cyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of high purity S-carboxymethyl-L-cyst will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-831363