Methoxy methyltriphenylphosphonium

A three-necked flask, fitted with a dropping funnel, thermocouple lead, and serum stopper, was thoroughly flame-dried and was charged with 2,66 g (7.75 mmol) of methoxy-methyltriphenylphosphonium chloride (recrystallized from ethyl acetate-chloroform and dried at 100°C/1 mm) and 40 mL of anhydrous THE The mixture was cooled to -20°C, and from a dropping funnel 4.75 mL of 1.6M n-butyl lithium in hexane was added. After all the... 

---