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Hydrochloric Acid → (3R,8S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7,8-dicarboxylic acid 7-tert-butyl ester

HRID 708631
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 708631
C[O:2][C:3]([C@@H:5]1[CH2:14][C:13]2[CH:12]=[C:11]3[O:15][CH2:16][C@@H:17]([C:19]4[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]5[CH:32]=[CH:31][C:30]([Cl:33])=[C:29]([Cl:34])[CH:28]=5)=[CH:21][CH:20]=4)[O:18][C:10]3=[CH:9][C:8]=2[CH2:7][N:6]1[C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])=[O:4].[Li+].[OH-].Cl>C1COCC1.CO>[C:38]([O:37][C:35]([N:6]1[C@H:5]([C:3]([OH:4])=[O:2])[CH2:14][C:13]2[CH:12]=[C:11]3[O:15][CH2:16][C@@H:17]([C:19]4[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]5[CH:32]=[CH:31][C:30]([Cl:33])=[C:29]([Cl:34])[CH:28]=5)=[CH:21][CH:20]=4)[O:18][C:10]3=[CH:9][C:8]=2[CH2:7]1)=[O:36])([CH3:41])([CH3:39])[CH3:40]
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Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 58327259(3R,8S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7,8-dicarboxylic acid 7-tert-butyl ester 8-methyl ester

Produkt 1

HCID 58327389(3R,8S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7,8-dicarboxylic acid 7-tert-butyl ester

Reagenzien, Katalysatoren, Lösungsmittel

1
HCID 21899815MeOH tetrahydrofuranLösungsmittel

Versuchsvorschrift

(3R,8S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7,8-dicarboxylic acid 7-tert-butyl ester 8-methyl ester (1.0 g) was dissolved in 60 mL of THF-MeOH (1:4) and the mixture cooled on an ice bath. 2 N aqueous LiOH (5 eq.) was added and the mixture was stirred on ice for 15 minutes and then at room temperature for 14 hours. The pH of the mixture was adjusted to about 2 with 1N HCl and extracted with EtOAc. The organic layer was washed with brine, dried over sodium sulfate and concentrated. DCM was added and mixture was again concentrated (900 mg). LCMS: m/z 587.

Aufarbeitung

  1. temperaturethe mixture cooled on an ice bath
  2. waitat room temperature for 14 hours
  3. extractionextracted with EtOAc
  4. washThe organic layer was washed with brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated
  7. additionDCM was added
  8. concentrationmixture was again concentrated (900 mg)

Quellen und Nachweise

ORD-Eintrag
ord-5fa915c26d02498981fe98294e821034
Quelldatensatz
uspto-grants-2015_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09175003B2

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