Reaktion #50827

Reaktionsgleichung

N,N,N',N'-tetramethyl-ethylenediamine

1-(p-bromobenzyl)-5-(3-chloropropyl)-1H-imidazole

lithium diisopropylamine

diisopropylamine

n-butyllithium

→

title compound

5-(p-Bromophenyl)-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine

Lösungsmittel

tetrahydrofuran

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigequenched at -78° with saturated ammonium chloride solution
2. 2
   Extraktionextracted with methylene chloride (3×10 ml)
3. 3
   TrocknenThe organic extracts and dried over sodium sulfate
4. 4
   Sonstigeevaporated

Vorschrift

A solution of lithium diisopropylamine, prepared at 0° from 0.12 ml of diisopropylamine and 0.33 ml of n-butyllithium (2.5M) in 2 ml of tetrahydrofuran under nitrogen, is added to a solution of 0.13 ml of N,N,N',N'-tetramethyl-ethylenediamine and 0.124 g of 1-(p-bromobenzyl)-5-(3-chloropropyl)-1H-imidazole in 2 ml of tetrahydrofuran at -78°. The reaction mixture is stirred for 3.5 h, quenched at -78° with saturated ammonium chloride solution and extracted with methylene chloride (3×10 ml). The organic extracts and dried over sodium sulfate and evaporated to yield the title compound which is purified by conversion to the hydrochloride salt, m.p. 216°.

Quelle