Hydrochloric Acid → H-Gly-Leu-Ala-OBzl

HRID 1655683

Reaktionsgleichung

Reaktionsgleichung von HRID 1655683
[NH:1](C(OC(C)(C)C)=O)[CH2:2][C:3]([NH:5][C@H:6]([C:11]([NH:13][C@H:14]([C:16]([O:18][CH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)=[O:17])[CH3:15])=[O:12])[CH2:7][CH:8]([CH3:10])[CH3:9])=[O:4].FC(F)(F)C(O)=O.N[C@H](C(N[C@H](C(OCC1C=CC=CC=1)=O)C)=O)CC(C)C.FC(F)(F)C([O-])=O.Cl>CCOCC.C(OCC)(=O)C>[NH2:1][CH2:2][C:3]([NH:5][C@H:6]([C:11]([NH:13][C@H:14]([C:16]([O:18][CH2:19][C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1)=[O:17])[CH3:15])=[O:12])[CH2:7][CH:8]([CH3:10])[CH3:9])=[O:4]

Komponenten

8

Edukt 5

HCID 313Hydrochloric AcidHCID 6422Trifluoroacetic acidHCID 84468TrifluoroacetateHCID 16742166H-Leu-Ala-OBzlHCID 131717744Boc-Gly-Leu-Ala-OBzl

Produkt 1

HCID 131717745H-Gly-Leu-Ala-OBzl

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

Boc-Gly-Leu-Ala-OBzl was prepared by coupling Boc-Gly-OH (5.70 g, 32.6 mmoles) to H-Leu-Ala-OBzl using the mixed anhydride procedure described in Example 2. The product (13.8 g) was obtained as an amorphous solid. Boc-Gly-Leu-Ala-OBzl was deblocked with trifluoroacetic acid by the procedure described for the preparation of H-Leu-Ala-OBzl except that the trifluoroacetate salt was soluble in ether. The preparation was dissolved in ethyl acetate and treated with anhydrous hydrogen chloride. The resulting product was precipitated by the addition of ether to yield 7.7 g of H-Gly-Leu-Ala-OBzl .HCl in a first crop.

Aufarbeitung

  1. customThe resulting product was precipitated by the addition of ether

Quellen und Nachweise

ORD-Eintrag
ord-8b52d57d8a714cfd8dace28118f3e22a
Quelldatensatz
uspto-grants-1993_10
Patentnummer
US05250720

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