Réaction #320213

Équation de réaction

2-(3-methoxyphenyl)pyrrolidine

potassium carbonate

2-picolyl chloride hydrochloride

→

2-(3-methoxyphenyl)-1-(2-pyridinylmethyl)pyrrolidine

Rendement 91.0%

Solvants

acetonitrile

Conditions de réaction

Traitement

1. 1
   FiltrationThe reaction mixture was filtered through a pad of celite
2. 2
   Lavagethe filter cake was washed with ethyl acetate
3. 3
   ConcentrationThe combined filtrates were concentrated
4. 4
   Autrethe residue was purified by flash column chromatography (silica gel, 5% methanol/ether)
5. 5
   AutreThe appropriate fractions were collected
6. 6
   Concentrationconcentrated

Mode opératoire

To a solution of 2-(3-methoxyphenyl)pyrrolidine (3.0 g) in dry acetonitrile (70 ml) was added milled potassium carbonate (6.1 g) followed by 2-picolyl chloride hydrochloride (3.1 g) at ambient temperature, under nitrogen, with stirring for 65 hrs. The reaction mixture was filtered through a pad of celite, and the filter cake was washed with ethyl acetate. The combined filtrates were concentrated and the residue was purified by flash column chromatography (silica gel, 5% methanol/ether). The appropriate fractions were collected and concentrated to give 4.1 g (91%) of 2-(3-methoxyphenyl)-1-(2-pyridinylmethyl)pyrrolidine. 2-(3-Methoxyphenyl)-1-(2-pyridinylmethyl)pyrrolidine and 48% hydrobromic acid (40 ml) were warmed to 100° C. for 7 hrs, cooled to ambient temperature, and neutralized with saturated sodium bicarbonate solution. The mixture was extracted with dichloromethane (2 times). The combined organic extracts were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated. The residue was purified by flash column chromatography (silica gel, 1:1 ethyl acetate/dichloromethane). The appropriate fractions were collected and concentrated to give 2.7 g (69%) of product, mp 96°-98° C.

Source