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A NOVEL SYNTHESIS OF QUINONE-IMMONIUM DYES
Marji, Dheeb,Tastoush, Hasan,Ibrahim, Jamil
, p. 4517 - 4522 (2007/10/02)
A new method was invoked to synthesize the colored quinoneimmonium cations from the reactions of DMSO with aromatic amines.The novel feature about this method is the use of DMSO as the methylating agent with a lewis acid such as TiCl4 as a catalyst.This reduced the number of steps traditionally used to prepare these dyes from aromatic amines.
