O-Toluidine → Tert-butyl 4-(4-(2-(o-toluidino)-4-(ethoxycarbonyl)oxazol-5-yl)phenyl)piperazine-1-carboxylate

HRID 389761

Reaktionsgleichung

Reaktionsgleichung von HRID 389761
[CH2:1]([O:3][C:4]([C:6]1[N:7]=[C:8](I)[O:9][C:10]=1[C:11]1[CH:16]=[CH:15][C:14]([N:17]2[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]2)=[CH:13][CH:12]=1)=[O:5])[CH3:2].[NH2:31][C:32]1[C:33]([CH3:38])=[CH:34][CH:35]=[CH:36][CH:37]=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(CCC)=CC(CCC)=CC=2CCC)CCCCC1.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:33]1([CH3:38])[C:32]([NH:31][C:8]2[O:9][C:10]([C:11]3[CH:16]=[CH:15][C:14]([N:17]4[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]4)=[CH:13][CH:12]=3)=[C:6]([C:4]([O:3][CH2:1][CH3:2])=[O:5])[N:7]=2)=[CH:37][CH:36]=[CH:35][CH:34]=1

Komponenten

7

Edukt 4

HCID 7242O-ToluidineHCID 11430Potassium CarbonateHCID 21081571Dicyclohexyl(2',4',6'-tripropyl-[1,1'-biphenyl]-2-yl)phosphineHCID 68522092Tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-iodooxazol-5-yl)phenyl)piperazine-1-carboxylate

Produkt 1

HCID 59587602Tert-butyl 4-(4-(2-(o-toluidino)-4-(ethoxycarbonyl)oxazol-5-yl)phenyl)piperazine-1-carboxylateAusbeute 54,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
150 °C

Versuchsvorschrift

A mixture of tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-iodooxazol-5-yl)phenyl)piperazine-1-carboxylate (0.06 g, 0.11 mmol), o-toluidine (0.061 ml, 0.57 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.005 g, 0.005 mmol), 2-(dicyclohexylphosphino)-2′,4′,6′-tri-1-propyl-1,1′-biphenyl (0.011 g, 0.02 mmol) and potassium carbonate (0.063 g, 0.46 mmol) in DMF (1.5 ml) was degassed and heated in the microwave at 150° C. for 20 minutes. The reaction mixture was diluted with EtOAc and washed with water (×2). The organic phase was passed through a MP-SH cartridge, dried over MgSO4 and the solvent removed in vacuo. The residue was purified by silica gel column chromatography using 10-90% EtOAc in hexane as gradient to afford tert-butyl 4-(4-(2-(o-toluidino)-4-(ethoxycarbonyl)oxazol-5-yl)phenyl)piperazine-1-carboxylate (0.030 g, 0.06 mmol, 52%). LCMS (1) Rt: 2.63 min; m/z (ES+) 507.

Aufarbeitung

  1. customwas degassed
  2. additionThe reaction mixture was diluted with EtOAc
  3. washwashed with water (×2)
  4. dry with materialdried over MgSO4
  5. customthe solvent removed in vacuo
  6. customThe residue was purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-2304a215c5b04db98a764bf1459a2f39
Quelldatensatz
uspto-grants-2013_02
Patentnummer
US08378095B2

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