ture of 5 mol of the epoxide and 5 mmol of morpholineborane in 30 mL of anhydrous ether was stirred at room temperature while 5 mmol of boron trifluoride etherate in 20 mL of ether were added dropwise. The reaction was stirred for 2 h and then poured into 50 mL of dilute hydrochloric acid. The ether layer was drawn off, and the acid layer was extracted with two small portions of methylene chloride. The combined organic layers were dried (anhydrous ...
