Sulfuric Acid → L-Alanyl-L-Glutamine

HRID 1373727Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1373727
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(C([NH:26][C@H:27]([C:29](O)=[O:30])[CH3:28])=O)(C)(C)C.ClC(Cl)(Cl)C(Cl)(Cl)Cl.[NH2:40][C@H:41]([C:47]([OH:49])=[O:48])[CH2:42][CH2:43][C:44](=[O:46])[NH2:45].[OH-].[Na+].S(=O)(=O)(O)O>CCOCC.O.C1(C)C=CC=CC=1>[NH2:26][C@H:27]([C:29]([NH:40][C@H:41]([C:47]([OH:49])=[O:48])[CH2:42][CH2:43][C:44](=[O:46])[NH2:45])=[O:30])[CH3:28]

Komponenten

10

Edukt 6

HCID 1118Sulfuric AcidHCID 5961L-GlutamineHCID 6214HexachloroethaneHCID 11776TriphenylphosphineHCID 14798Sodium HydroxideHCID 42254381(S)-N-tert-butylcarbonylalanine

Produkt 1

HCID 123935L-Alanyl-L-GlutamineAusbeute 52 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 962WaterLösungsmittelHCID 1140TolueneLösungsmittel2×HCID 3283Diethyl EtherLösungsmittel2×

Versuchsvorschrift

Dissolve 10 mmol of triphenylphosphine with 10 ml of toluene, drop it into a mixed system composed of 10 mmol of tert-butylcarbonylalanine (Boc-Ala), 10 mmol of hexachloroethane and 20 ml of toluene. After reacting at 5° C. for 2 hours, drop it into a liquid mixture containing 15 mmol of glutamine, 20 ml of water and 60 ml of petrolium ether. While reacting, regulate pH to 12 with sodium hydroxide, the reaction temperature is 10° C., the reaction time after dropping is 1.5 hours. And then acidify it to regulate pH=1.5 with dilute sulfuric acid. The aqueous phase, after concentrated, reacts with hydrogen chloride/1,4-dioxane at room temperature for 5 hours. As the reaction is finished, add in 50 ml of ether, solids deposit, the product L-Ala-L-Gln with a yield of 52% is obtained by recrystallizing the solids with 1,4-dioxane-water.

Aufarbeitung

  1. customis 10° C.
  2. waitthe reaction time after dropping is 1.5 hours
  3. concentrationThe aqueous phase, after concentrated
  4. customreacts with hydrogen chloride/1,4-dioxane at room temperature for 5 hours

Quellen und Nachweise

ORD-Eintrag
ord-94244808a4d9472a86365f7aa30787d9
Quelldatensatz
uspto-grants-2007_01
Patentnummer
US07163917B2

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