Unfortunately, in all cases examined, the product organoselenide heterocycles were unstable to chromatographic purification with unadulterated silica gel, triethylamine-treated silica gel, neutral alumina, Florisil, and Davisil. In general, starting material was fully consumed in these reactions with few side products. The main impurities were unreacted N-(phenylseleno)phthalimide reagent, phthalimide, and 10-camphorsulfonic acid. In the instances shown here (Scheme 2), washing with 0.5 M aqueous NaOH solution was sufficient to yield reasonably pure compound, but the inability to purify by chromatography hampered our substrate survey.