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A solution of 32.8 g (145 mmol) of 2-[(methylamino)methyl]-α-phenylbenzenemethanamine in 215 mL of chloroform was treated with 25.9 g (159 mmol) of carbonyldiimidazole. The reaction was stirred at room temperature for 19 hours, washed four times with water, dried over sodium sulfate and stripped in vacuo. The gummy residue was triturated in and recrystallized from ethyl acetate to yield 26 g (71%) of product, mp 198-199.

1. washwashed four times with water
2. dry with materialdried over sodium sulfate
3. customThe gummy residue was triturated in and
4. customrecrystallized from ethyl acetate