Lithium hydroxide, monohydrate → 2-((Tert-butoxy)carbonyl)-1,2,3,4-tetrahydroisoquinoline-7-carboxylic acid

HRID 1808376Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1808376
O.[OH-].[Li+].C[C:5]1([C:22]([O-:24])=[O:23])[CH:14]=[C:13]2[C:8]([CH2:9][CH2:10][N:11]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:12]2)=[CH:7][CH2:6]1>O.CO>[C:18]([O:17][C:15]([N:11]1[CH2:10][CH2:9][C:8]2[C:13](=[CH:14][C:5]([C:22]([OH:24])=[O:23])=[CH:6][CH:7]=2)[CH2:12]1)=[O:16])([CH3:21])([CH3:19])[CH3:20]

Komponenten

5

Edukt 2

HCID 168937Lithium hydroxide, monohydrateHCID 86645320HCID 86645320, Verbindung

Produkt 1

HCID 189883742-((Tert-butoxy)carbonyl)-1,2,3,4-tetrahydroisoquinoline-7-carboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

Lithium hydroxide monohydrate (5.8 g, 0.136 mol) dissolved in water (73 ml) was added to a solution of 2-tert-butyl 7-methyl-3,4-dihydroisoquinoline-2,7(1H)-dicarboxylate (7.9 g, 0.027 mol) in methanol (110 ml), and the mixture was stirred for 4 h. The solvent was removed in vacuo. Water and diethyl ether were added to the residue, and the phases were separated. The aqueous phase was adjusted to an acidic pH with dilute aqueous HCl solution and extracted with ethyl acetate. The organic phase was dried over magnesium sulfate, filtered and concentrated in vacuo. The resulting crude product was used directly in the following stage. Yield: 5.8 g (76%).

Aufarbeitung

  1. customThe solvent was removed in vacuo
  2. additionWater and diethyl ether were added to the residue
  3. customthe phases were separated
  4. extractionextracted with ethyl acetate
  5. dry with materialThe organic phase was dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-d4cc49a2d6e44ecaa19fb04fae84abd6
Quelldatensatz
uspto-grants-2013_01
Patentnummer
US08357717B2

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