tert-Butanol → 2,2-Dimethyl-1-(pyrazin-2-yl)cyclopropanol
Reaktionsgleichung
[CH3:1][CH:2]([CH3:12])[CH2:3][C:4]([C:6]1[CH:11]=[N:10][CH:9]=[CH:8][N:7]=1)=[O:5].C(O)(C)(C)C>C1C=CC=CC=1>[CH3:1][C:2]1([CH3:12])[CH2:3][C:4]1([C:6]1[CH:11]=[N:10][CH:9]=[CH:8][N:7]=1)[OH:5]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of 3-methyl-1-(pyrazin-2-yl)butan-1-one (1.0 g, 6.1 mmol) in 120 mL of a 19/1 mixture of tert-butanol and benzene was irradiated using a 6 W 366 nm lamp (TLC lamp) in a pyrex glass tube. The conversion was 50% after 16 h and 80% after 40 h. At this point the volatiles were removed in vacuo and the material was purified by column chromatography (silica, EtOAc/heptanes 1/4) to afford 2,2-dimethyl-1-(pyrazin-2-yl)cyclopropanol as a reddish-brown oil (375 mg; 38%). 1H NMR (CDCl3) 0.90 (3H, s), 1.00 (2H, d), 1.40 (2H, s), 3.20 (1H, s), 8.42 (1H, m), 8.50 (1H, m), 8.76 (1H, m).