o-Bromocumene → 1-(3-Benzyl-phenyl)-2-(S)-isopropyl-4-(2-isopropyl-phenyl)-piperazine

HRID 25861

Reaktionsgleichung

[CH2:1]([C:8]1[CH:9]=[C:10]([N:14]2[CH2:19][CH2:18][NH:17][CH2:16][C@@H:15]2[CH:20]([CH3:22])[CH3:21])[CH:11]=[CH:12][CH:13]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Br[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=1[CH:30]([CH3:32])[CH3:31].CC([O-])(C)C.[Na+].COCCOC.CCO>C1(C)C=CC=CC=1.CCOCC.C1(P(C2C=CC=CC=2)C2C=CC=CC=2C2C=CC=CC=2N(C)C)C=CC=CC=1>[CH2:1]([C:8]1[CH:9]=[C:10]([N:14]2[CH2:19][CH2:18][N:17]([C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[CH:30]([CH3:32])[CH3:31])[CH2:16][C@@H:15]2[CH:20]([CH3:22])[CH3:21])[CH:11]=[CH:12][CH:13]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

Reaktionsbedingungen

Temperatur: 80 °C

Versuchsvorschrift

110.7 mg (0.38 mmol) 4-(3′-Benzylphenyl)-3-(S)-isopropyl-piperazine (88a), 123.5 mg (0.62 mmol, 1.65 eq.) 1-Bromo-2-isopropyl-benzene 11.7 mg (12.7 μmol, 0.034 eq.) Pd2(dba)3, 7.4 mg (19.3 μmol, 0.05 eq.) 2-Diphenylphosphino-2′-dimethylamino-biphenyl and 87.3 mg (0.91 mmol, 2.42 eq.) NaOt-Bu were dissolved in 5 ml dry toluene. The resulting mixture was heated under N2 at 80° C. for 15.5 h. After cooling to room temperature the mixture was diluted with ether and washed with brine. The comb. org. fractions were dried over Na2SO4 and evaporated. Column chromatography (hexanes/EtOAc (9+1)) yielded 96.5 mg (0.23 mmol, 62.20%) 1-(3-Benzyl-phenyl)-2-(S)-isopropyl-4-(2-isopropyl-phenyl)-piperazine (89) as a clear oil.

Aufarbeitung

temperatureAfter cooling to room temperature the mixture
washwashed with brine
dry with materialfractions were dried over Na2SO4
customevaporated

Quellen und Nachweise

ORD-Eintrag: ord-1b122892a0f943948cd06552bfdb562e
Quelldatensatz: uspto-grants-2005_02
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06858600B2

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