Reaktion #1437546

Reaktionsgleichung

(S)-1,4-dibenzyl-2-(2-pyridinyl-ethyl)-piperazine

ethanol

ammonium formate

→

title compound

Ausbeute 86.0%

(S)-2-(2-Pyridin-4-yl-ethyl)-piperazine

Ausbeute 86.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationfilter the palladium on carbon
2. 2
   Einengenconcentrate the filtrate
3. 3
   SonstigePurify by silica gel chromatography

Vorschrift

Dissolve (S)-1,4-dibenzyl-2-(2-pyridinyl-ethyl)-piperazine (2.14 g, 5.76 mmol) in ethanol (40 mL). Add ammonium formate (2.18 g, 34.6 mmol) and palladium (430 mg, 5 wt. % on carbon) and heat to reflux. After 6 hours 30 minutes, filter the palladium on carbon and concentrate the filtrate. Purify by silica gel chromatography using 7N ammonia in methanol-methylene chloride (5%–15%) as the eluent to give 945 mg (86%) of the title compound: mp 113–116° C.; mass spectrum (ion spray): m/z=192 (M+1). Analysis calculated for C11H17N3: C, 69.07; H, 8.96; N, 21.97. Found: C, 69.08; H, 8.77; N, 21.81.

Quelle