Ethyl orthopropionate → tert-butyl 4-[(7-bromo-2-ethyl-1H-imidazo[4,5-c]quinolin-1-yl)methyl]piperidine-1-carboxylate

HRID 9441

Reaktionsgleichung

Reaktionsgleichung von HRID 9441
[NH2:1][C:2]1[CH:3]=[N:4][C:5]2[C:10]([C:11]=1[NH:12][CH2:13][CH:14]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]1)=[CH:9][CH:8]=[C:7]([Br:27])[CH:6]=2.[C:28](OCC)(OCC)(OCC)[CH2:29][CH3:30]>>[Br:27][C:7]1[CH:8]=[CH:9][C:10]2[C:11]3[N:12]([CH2:13][CH:14]4[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:24])([CH3:26])[CH3:25])=[O:21])[CH2:16][CH2:15]4)[C:28]([CH2:29][CH3:30])=[N:1][C:2]=3[CH:3]=[N:4][C:5]=2[CH:6]=1

Komponenten

3

Edukt 2

HCID 66995Ethyl orthopropionateHCID 21984428Tert-butyl 4-[(3-amino-7-bromoquinolin-4-ylamino)methyl]piperidine-1-carboxylate

Produkt 1

HCID 21984257tert-butyl 4-[(7-bromo-2-ethyl-1H-imidazo[4,5-c]quinolin-1-yl)methyl]piperidine-1-carboxylateAusbeute 77,1 %

Versuchsvorschrift

The method described in Part A of Examples 142–144 was used to treat tert-butyl 4-[(3-amino-7-bromoquinolin-4-ylamino)methyl]piperidine-1-carboxylate (15.0 g, 34.5 mmol) with triethyl orthopropionate (6.68 g, 37.9 mmol). After completion, the reaction mixture was concentrated under reduced pressure, and the residue was purified by flash column chromatography on silica gel (eluting with 95:5 chloroform:CMA) followed by recrystallization from ethyl acetate to provide 12.6 g of tert-butyl 4-[(7-bromo-2-ethyl-1H-imidazo[4,5-c]quinolin-1-yl)methyl]piperidine-1-carboxylate as a white powder, mp 208–209° C.

Aufarbeitung

  1. concentrationAfter completion, the reaction mixture was concentrated under reduced pressure
  2. customthe residue was purified by flash column chromatography on silica gel (eluting with 95:5 chloroform:CMA)
  3. customfollowed by recrystallization from ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-9ba31f07c1b444a68ce2aed691763f55
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07091214B2

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