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Under argon, butyl lithium in hexane (4.1 ml, 1.6 M solution) was added to a solution of 4-picoline (0.58 ml) in THF (25 ml) at -30° C. The solution was stirred for 1 hr at room temperature then cooled to 0° C. and anhydrous manganese chloride (0.76 g) added. The reaction was then stirred at room temperature for 1 hr.

1. temperaturethen cooled to 0° C.
2. stirringThe reaction was then stirred at room temperature for 1 hr