A-ARArmy Artillery Board (Fort Sill, OK)
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Synthesis of Dialdehyde (A-1, A-2, A-3, A-4, A-5 and A-Ar) Dimethylene 1,2-bis(4-oxybenzaldehyde) (A-1), Tetramethylene 1,4-bis(4-oxybenzaldehyde) (A-2) , Pentamethylene 1,5-bis(4-oxybenzaldehyde) (A-3), Hexamethylene 1,6-bis(4-oxybenzaldehyde) (A-4), Octamethylene 1,6-bis(4-oxybenzaldehyde) (A-5) and Phenylene 1,4-bis[methylene(4- oxybenzaldehyde) (A-Ar) were synthesized according to the reported method.
A baked 250mL round bottom flask equipped with magnetic stirrer, reflux condenser, nitrogen inlet was charged with dried ethanol (solvent), 10mmol of dialdehyde (A-1, A-2, A-3, A- 4, A-5 and A-Ar) and 20mmol of 4-aminophenol.