Reaktion #61987

Reaktionsgleichung

DCM

product

4-(3-Piperidin-1-yl-propoxy)-benzaldehyde

1-Piperidin-4-yl-1H-benzoimidazole

sodium triacetoxyborohydride

sodium hydroxide

→

ammonia DCM

Ausbeute 1.0%

title compound

1-{1-[4-(3-Piperidin-1-yl-propoxy)-benzyl]-piperidin-4-yl}-1H-benzoimidazole

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 the product of Example 9 (82 mg), 1-Piperidin-4-yl-1H-benzoimidazole (62 mg), and acetic acid (0.03 mL) in DCM (3 mL) was treated with sodium triacetoxyborohydride (110 mg). After 16 h, the resulting mixture was treated with 10% sodium hydroxide (5 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 (81 mg). 1H NMR (400 MHz, CDCl3): 7.98 (s, 1H), 7.80 (m, 1H), 7.42 (m, 1H), 7.30-7.20 (m, 4H), 6.87 (d, J=8.6 Hz, 2H), 4.18 (m, 1H), 4.00 (t, J=6.3 Hz, 2H), 3.52 (s, 2H), 3.10-3.03 (m, 2H), 2.48 (m, 2H), 2.41 (br, 4H), 2.21-2.10 (m, 5H), 2.01-1.94 (m, 2H), 1.62-1.55 (m, 4H), 1.47-1.39 (m, 2H).

Quelle