Methyl iodide → 2-Ethyl-1H-pyrrolo(2,3-b)pyridine

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2-methyl-7-azaindole (1.32 g, 10 mmol) in dry diethyl ether (60 ml) at room temperature under an inert atmosphere is added n-BuLi (18.8 ml of a 1.6 M solution in hexanes, 30 mmol) followed by t-BuOK (2.24 g, 20 mmol). The reaction mixture is stirred at room temperature for 40 minutes and then cooled to −70° C. whereupon methyl iodide (1.25 ml, 20 mmol) is added dropwise. Stirring continues for a further 2 hours after which time, the reaction mixture is quenched with water (2 ml) and is allowed to slowly warm to room temperature. The cooled solution is poured onto water (200 ml), neutralized with 1N HCl and then extracted with diethyl ether (80 ml). The organic portion is washed with water (2×60 ml), dried (Na2SO4) and concentrated in vacuo to yield the titled compound as orange crystals. [MH+CH3CN]+=188)

Herkunft & Nachweise