Author/Authors :
Yu-Ying Lai، نويسنده , , Nai-Ti Lin، نويسنده , , Yi-Hung Liu، نويسنده , , Yu Wang، نويسنده , , Tien-Yau Luh، نويسنده ,
Abstract :
Treatment of 4-aminobenzyl esters with Al2O3 in DCM at rt afforded the dealkylative dimerized 4,4′-diamino-diphenylmethanes in satisfactory yield. The reaction may proceed via a quinone methide iminium ion intermediate, which may then undergo Michael type addition followed by retro-aldol extrusion of a formaldehyde species.
