Combined phase transfer catalysis and ultrasound to enhance tandem alkylation of azo dyes
作者:Xiang Li、Jie Wang、Richard Mason、Xiu R Bu、Joycelyn Harrison
DOI:10.1016/s0040-4020(02)00331-9
日期:2002.5
Ultrasound has been found to enhance N-substitution against elimination in the reaction of carbazole-containing bromides 3 with a Disperse Orange 3 derivative 2 under PTC condition. Upon using combined PTC and ultrasound conditions, a series of bifunctional molecules 1 have been prepared to possess charge-transporting agents and nonlinear optical chromophores in 2:1 ratio.