Reaktion #61994

Reaktionsgleichung

2-(3-piperidin-1-yl-propoxy)-benzaldehyde

4-benzylidene-piperidine

sodium triacetoxyborohydride

DCM

sodium hydroxide

→

ammonia DCM

Ausbeute 1.0%

title compound

1-{3-[2-(4-Benzylidene-piperidin-1-ylmethyl)-phenoxy]-propyl}-piperidine

Lösungsmittel

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with DCM (3×10 mL)
2. 2
   TrocknenThe combined organic phases were dried (sodium sulfate)
3. 3
   Sonstigeevaporated

Vorschrift

A solution of 2-(3-piperidin-1-yl-propoxy)-benzaldehyde (212 mg), 4-benzylidene-piperidine (154 mg), and acetic acid (0.05 mL) in DCM (3 mL) was treated with sodium triacetoxyborohydride (290 mg). After 16 h, the resulting mixture was treated with 10% sodium hydroxide (6 mL) and extracted with DCM (3×10 mL). The combined organic phases were dried (sodium sulfate) and evaporated. Chromatography of the residue (1-5% 2 M methanolic ammonia/DCM) gave the title compound as a colorless oil (148 mg). 1H NMR (400 MHz, CDCl3): 7.37 (m, 1H), 7.30 (m, 2H), 7.23-7.16 (m, 4H), 6.92 (m, 1H), 6.86 (m, 1H), 6.27 (s, 1H), 4.00 (t, J=6.3 Hz, 2H), 3.60 (s, 2H), 2.60 (m, 2H), 2.55-2.46 (m, 6H), 2.44-2.37 (m, 6H), 2.00 (m, 2H), 1.64-1.56 (m, 4H), 1.47-1.40 (m, 2H).

Quelle