Reaktion #9073

Reaktionsgleichung

4-(oxazol-5-yl)benzyl alcohol

→

aldehyde

4-(oxazol-5-yl)benzaldehyde

Lösungsmittel

CH2Cl2 MeOH

CH2Cl2

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationfiltered through Celite®
2. 2
   Waschenwashing with CHCl3
3. 3
   EinengenThe filtrate was concentrated

Vorschrift

To a stirred solution of the 4-(oxazol-5-yl)benzyl alcohol (prepared as described by Tanaka, A.; Terasawa, T.; Hagihara, H.; Sakuma, Y.; Ishibe, N.; Sawada, M.; Takasugi, H.; Tanaka, H. J. Med. Chem. 1998, 41, 2390–2410) (0.23 g, 1.31 mmol) in CH2Cl2/MeOH (20:1, 10.5 mL) was added activated MnO2 (1.01 g, 11.6 mmol) and the mixture stirred at room temperature overnight. The reaction was then diluted with CH2Cl2 (10 mL) and filtered through Celite®, washing with CHCl3. The filtrate was concentrated to give the crude aldehyde as a beige solid (0.164 g) which used without further purification in the next reaction. 1H NMR (CDCl3) δ 7.52 (s, 1H), 7.82 (d, 2H, J=9 Hz), 7.95 (d, 2H, J=9 Hz), 7.99 (s, 1H), 10.02 (s, 1H).

Quelle