1,2-Dimethoxyethane → 2-{5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 71725Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 71725
[CH2:1]([O:8][C:9]1[CH:14]=[C:13](Br)[CH:12]=[CH:11][N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:16]([O:20][C:21]([N:23]1[CH2:27][CH2:26][CH2:25][CH:24]1[C:28]1[NH:29][C:30]([C:33]2[CH:38]=[CH:37][C:36](B3OC(C)(C)C(C)(C)O3)=[CH:35][CH:34]=2)=[CH:31][N:32]=1)=[O:22])([CH3:19])([CH3:18])[CH3:17].C(COC)OC>C([O-])([O-])=O.[K+].[K+].C(OCC)(=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:16]([O:20][C:21]([N:23]1[CH2:27][CH2:26][CH2:25][CH:24]1[C:28]1[NH:29][C:30]([C:33]2[CH:38]=[CH:37][C:36]([C:13]3[CH:12]=[CH:11][N:10]=[C:9]([O:8][CH2:1][C:2]4[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=4)[CH:14]=3)=[CH:35][CH:34]=2)=[CH:31][N:32]=1)=[O:22])([CH3:19])([CH3:17])[CH3:18]

Komponenten

7

Edukt 3

HCID 80711,2-DimethoxyethaneHCID 532173892-(Benzyloxy)-4-bromopyridineHCID 574497592-{4-[4-(4,4,5,5-Tetramethyl[1,3,2]dioxaborolan-2-yl)phenyl]-1h-imidazol-2-yl}pyrrolidine-1-carboxylic acid tert-butyl ester

Produkt 1

HCID 666202502-{5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl esterAusbeute 96,5 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 8857Ethyl AcetateLösungsmittelHCID 11430Potassium CarbonateLösungsmittel

Reaktionsbedingungen

Temperatur
85 °C

Versuchsvorschrift

A mixture of 2-Benzyloxy-4-bromo-pyridine (0.292 g), 2-{5-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (0.533 g, prepared according to WO2008021927 A2) and Pd(PPh3)4 (0.064 g) in aq. K2CO3 solution/dimethoxyethane (1.82 mL/5.0 mL) was heated at 80-90° C. for 8 hours. Reaction mixture was cooled, diluted with ethyl acetate, washed with brine, dried (MgSO4) and concentrated. The residue was purified by flash column chromatography (silica gel, 20 to 80% ethyl acetate/hexanes) to give 2-{5-[4-(2-Benzyloxy-pyridin-4-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (0.530 g): LCMS-ESI+: calc'd for C30H33N4O3: 497.6 (M+H+). Found: 497.0 (M+H+).

Aufarbeitung

  1. customReaction mixture
  2. temperaturewas cooled
  3. washwashed with brine
  4. dry with materialdried (MgSO4)
  5. concentrationconcentrated
  6. customThe residue was purified by flash column chromatography (silica gel, 20 to 80% ethyl acetate/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-e734d634c4264ffdb6fd2f67f550f264
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08822430B2

Notizen zur Reaktion

Wird geladen…