trans-2,cis-6-Nonadienal → (4E,8Z)-Undeca-2.4.8-trienylbenzene
Reaktionsgleichung
[Br-].[CH2:2]([P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[CH2:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[Li]CCCC.[CH:34](=O)/[CH:35]=[CH:36]/[CH2:37][CH2:38]/[CH:39]=[CH:40]\[CH2:41][CH3:42]>>[CH2:3]([C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1)[CH:2]=[CH:34]/[CH:35]=[CH:36]/[CH2:37][CH2:38]/[CH:39]=[CH:40]\[CH2:41][CH3:42]Komponenten
4
Versuchsvorschrift
Starting from phenethyltriphenylphosphonium bromide (3.05 g, 6.82 mmol, 1.0 equiv.), n-BuLi (1.6M in hexanes, 4.3 mL, 6.82 mmol, 1.0 equiv.) and (2E,6Z)-nona-2,6-dienal (1.41 g, 10.2 mmol, 1.5 equiv.), 0.94 g (61%) of the title compound as a colorless oil was obtained after purification by flash chromatography on SiO2 (cyclohexane/EtOAc 995:5).