SYNTHETIC COMMUNICATIONS, 25(20), 3155-3162 (1995 ... Then methylene chloride (-1 0 ml) is added and the solution is washed with 0.1 N aqueous sodmm hydroxide (5 x 20 ml ... 1 0) Pawlenko, S.; Lang-Fugmann, S.; in: Houben-Weyl, Methoden der Organischen Chemie Vol. ...