4-tert-Butylphenylboronic acid → 6-(4-tert-butyl-phenoxy)-3,4-dihydro-1H-isoquinoline-2,3-dicarboxylic acid 2-tert-butyl ester 3-methyl ester

HRID 1984817Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1984817
[CH3:1][O:2][C:3]([CH:5]1[CH2:14][C:13]2[C:8](=[CH:9][CH:10]=[C:11]([OH:15])[CH:12]=2)[CH2:7][N:6]1[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])=[O:4].[C:23]([C:27]1[CH:32]=[CH:31][C:30](B(O)O)=[CH:29][CH:28]=1)([CH3:26])([CH3:25])[CH3:24]>C(Cl)Cl.C([O-])(=O)C.[Cu+2].C([O-])(=O)C>[CH3:1][O:2][C:3]([CH:5]1[CH2:14][C:13]2[C:8](=[CH:9][CH:10]=[C:11]([O:15][C:30]3[CH:31]=[CH:32][C:27]([C:23]([CH3:26])([CH3:25])[CH3:24])=[CH:28][CH:29]=3)[CH:12]=2)[CH2:7][N:6]1[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])=[O:4]

Komponenten

5

Edukt 2

HCID 27343204-tert-Butylphenylboronic acidHCID 577645552-tert-Butyl 3-methyl 6-hydroxy-3,4-dihydroisoquinoline-2,3(1H)-dicarboxylate

Produkt 1

HCID 671180436-(4-tert-butyl-phenoxy)-3,4-dihydro-1H-isoquinoline-2,3-dicarboxylic acid 2-tert-butyl ester 3-methyl esterAusbeute 49,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8895Cupric acetateKatalysatorHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

6-Hydroxy-3,4-dihydro-1H-isoquinoline-2,3-dicarboxylic acid 2-tert-butyl ester 3-methyl ester (0.5 g, 1.62 mmol) in DCM (15 mL) was treated with copper acetate (0.59 g, 3.3 mmol), 4-tert-butylphenylboronic acid (0.87 g, 4.8 mmol), and TEA (1.0 mL, 7.9 mmol) by the general procedure G. The crude product was purified by flash column chromatography on silica gel using Hexanes:EtOAc (70:30) to give 0.35 g of 6-(4-tert-butyl-phenoxy)-3,4-dihydro-1H-isoquinoline-2,3-dicarboxylic acid 2-tert-butyl ester 3-methyl ester which was deprotected using general procedure N to give 6-(4-tert-butyl-phenoxy)-1,2,3,4-tetrahydro-isoquinoline-(3S)-carboxylic acid methyl ester hydrochloride salt (0.27 g).

Aufarbeitung

  1. customThe crude product was purified by flash column chromatography on silica gel

Quellen und Nachweise

ORD-Eintrag
ord-1c8da13226994f1c917c23e88313c587
Quelldatensatz
uspto-grants-2009_06
Patentnummer
US07544699B2

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