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17. Recycling procedure:
A 10 ml round-bottomed flak was charged with 4-
chloroiodobenzene (3 mmol, 0.72 g), phenylacetylene (4.5 mmol, 0.50 ml),
pyrrolidine (6 mmol, 0.51 ml), and Pd EnCat 40 (1 mol % Pd, 75 mg). The
mixture was stirred at 85 °C for the time specified in Table 5, then cooled to
room temperature, diluted with AcOEt (20 ml) and water (20 ml), and
filtered through a glass filter (G5). The recovered catalyst was washed upon
the filter with AcOEt (2 Â 10 ml) and water (2 Â 10 ml), dried under vacuum
and reused.
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