C - Chemistry – Metallurgy – 07 – K
Patent
C - Chemistry, Metallurgy
07
K
530/5.06, 195/12
C07K 5/06 (2006.01) C07K 5/072 (2006.01)
Patent
CA 1186648
ABSTRACT OF THE DISCLOSURE: A process for recovering a dipeptide derivative comprises admixing an organic solvent capable of forming a binary phase system with water with an aqueous mixture containing as a solid component a dipeptide ester derivative of the formula Image (I) wherein R1 is a lower alkyl group, R2 is a side chain group of an amino acid, n is 1 or 2, X is a benzyloxycarbonyl group which can have a nuclear substituent and Y is a hydrogen ion or an ammonium derivative ion of the formula (II) Image wherein R3 is a side chain group of an amino acid and R4 is a lower alkyl group, settling the resulting admixture to form (1) an organic solvent phase containing in a solid state a substantial amount of dipeptide derivative of the formula Image (III) wherein R1, R2, n and X are as defined above and Z is a hydrogen ion or an ammonium derivative ion of the formula Image (IV) wherein R3 and R4 are as defined above and (2) an aqueous phase, separating the organic solvent phase from the aqueous phase, and recovering the dipeptide derivative from the organic solvent phase.
411792
Hagi Norio
Irino Shigeaki
Oyama Kiyotaka
Marks & Clerk
Sagami Chemical Research Center
Toyo Soda Manufacturing Co. Ltd.
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