Reaktion #62007

Reaktionsgleichung

product

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

4-(4-chloro-phenyl)-piperidin-4-ol

sodium triacetoxyborohydride

DCM

sodium hydroxide

→

ammonia DCM

Ausbeute 1.0%

title compound

4-(4-Chloro-phenyl)-1-[4-(3-piperidin-1-yl-propoxy)-benzyl]-piperidin-4-ol

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 (200 mg), 4-(4-chloro-phenyl)-piperidin-4-ol (170 mg), and acetic acid (0.05 mL) in DCM (3 mL) was treated with sodium triacetoxyborohydride (300 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 (203 mg). 1H NMR (400 MHz, CDCl3): 7.46-7.42 (m, 2H), 7.32-7.28 (m, 2H), 7.25-7.22 (m, 2H), 6.87-6.84 (m, 2H), 3.99 (t, J=6.3 Hz, 2H), 3.51 (s, 2H), 2.78 (m, 2H), 2.51-2.36 (m, 8H), 2.11 (m, 2H), 1.98 (m, 2H), 1.69 (m, 2H), 1.63-1.56 (m, 4H), 1.48-1.40 (m, 2H).

Quelle