... The organic layer was washed with water (2 X 200 mL), 10% NaHC0, (2 X 200 mL), and water, successively. After being dried over Na2S04, the ethyl acetate solution was concentrated to yield a semisolid, which was Scheme 111" ... Page 5. 5276 J. Org. Chem., Vol. 54, No. ...