Reaktion #61976

Reaktionsgleichung

product

1-[4-(3-Pyrrolidin-1-yl-propoxy)-phenyl]-piperazine hydrochloride

benzaldehyde

acetic acid

sodium triacetoxyborohydride

dichloroethane

→

ammonia methanol dichloromethane

Ausbeute 5.0%

title compound

1-Benzyl-4-[4-(3-pyrrolidin-1-yl-propoxy)-phenyl]-piperazine

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe reaction was quenched with saturated aqueous sodium bicarbonate
2. 2
   Extraktionthe aqueous phase was extracted with dichloromethane (120 mL)
3. 3
   TrocknenThe organic phase was dried (magnesium sulfate)
4. 4
   Sonstigeevaporated in vacuo

Vorschrift

A solution of the product of Example 23 (148 mg), benzaldehyde (520 mg), and acetic acid (25 mg) in dichloroethane (3 mL) was treated with sodium triacetoxyborohydride (121 mg). After 14 h, the reaction was quenched with saturated aqueous sodium bicarbonate, and the aqueous phase was extracted with dichloromethane (120 mL). The organic phase was dried (magnesium sulfate) and evaporated in vacuo. Silica gel chromatography of the residue (5% 2M ammonia-methanol/dichloromethane) gave the title compound as a light yellow solid (8 mg). 1H NMR (400 MHz, CDCl3): 7.36-7.24 (m, 5H), 6.94-6.81 (m, 4H), 3.96 (t, J=6.4 Hz, 2H), 3.56 (s, 2H), 3.08 (t, J=4.9 Hz, 4H), 2.64-2.60 (m, 4H), 2.04-1.94 (m, 2H), 1.80-1.75 (m, 4H).

Quelle