反应详情

p-toluidine (0.20 mole), 4-biphenylaldehyde (0.20 mole), and IRC-50 (weakly acidic) ion exchange resin (0.5 g.) are azeotropically refluxed in toluene (150 cc). The required amount of water is removed after about 3 hours. The solvent is removed on the rotary, and the residue is recrystallized with 95% ethanol to yield N-[(p-phenyl)benzylidene]-p-methylaniline. m.p. 137°-139° C.

1. customThe required amount of water is removed after about 3 hours
2. customThe solvent is removed on the rotary, and the residue
3. customis recrystallized with 95% ethanol