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Under argon, butyl lithium in hexane (8.35 ml, 1.6 M solution) was added to a solution of 4-picoline (1.23 g) in THF (25 ml) at -30° C. slowly over 20 mins. The solution was then stirred at room temperature for 1 hr and anhydrous manganous chloride (1.51 g) added at 0° C. The suspension was stirred for ca. 3/4 hr at room temperature.

1. stirringThe suspension was stirred for ca. 3/4 hr at room temperature