Hydrochloric Acid → 6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

HRID 2169254Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2169254
C([O:8][C:9]1[C:14](=[O:15])[N:13]=[C:12]([CH2:16][C:17]2([C:22]3[CH:27]=[C:26]([Cl:28])[CH:25]=[CH:24][C:23]=3[Cl:29])[CH2:21][CH2:20][CH2:19][CH2:18]2)[N:11]2[CH2:30][CH2:31][N:32]([CH:35]([CH3:37])[CH3:36])[C:33](=[O:34])[C:10]=12)C1C=CC=CC=1.Cl.C(OCC)(=O)C>CO>[Cl:29][C:23]1[CH:24]=[CH:25][C:26]([Cl:28])=[CH:27][C:22]=1[C:17]1([CH2:16][C:12]2[N:11]3[CH2:30][CH2:31][N:32]([CH:35]([CH3:37])[CH3:36])[C:33](=[O:34])[C:10]3=[C:9]([OH:8])[C:14](=[O:15])[N:13]=2)[CH2:21][CH2:20][CH2:19][CH2:18]1

Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 867259049-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

Produkt 1

HCID 867259056-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dioneAusbeute 11,34 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a stirred solution of 9-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (208) (500 mg, 0.93 mmol) in methanol (5.5 mL) was added concentrated HCl (4 mL) and the mixture was stirred for 20 h. Silica thin layer chromatography was performed (100% ethyl acetate, Rf=0.3). Methanol was removed, water was added, the mixture was basified (pH˜8) with solid NaHCO3, extracted with ethyl acetate (3×20 mL), and the organic part was dried and concentrated. The crude product was purified by preparative HPLC purification to get 6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (209) (32 mg, 11.34%) as a light brown solid.

Aufarbeitung

  1. customMethanol was removed
  2. additionwater was added
  3. extractionextracted with ethyl acetate (3×20 mL)
  4. customthe organic part was dried
  5. concentrationconcentrated
  6. customThe crude product was purified by preparative HPLC purification

Quellen und Nachweise

ORD-Eintrag
ord-f47f4861811d4552942d62435e88770a
Quelldatensatz
uspto-grants-2015_06
Patentnummer
US09045486B2

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