Phase Transfer Catalysis for Tandem Alkylation of Azo Dyes for the Synthesis of Novel Multifunctional Molecules
摘要:
Potentially photorefractive molecules, which possess both a charge transfer component and a nonlinear optical chromophore, were prepared by the direct N-monoalkylation of Disperse Orange 3 (1) with a carbazole alkyl bromide (2) utilizing phase transfer catalysis. Further N-alkylation of the remaining active N-H with alkyl halides with various chain lengths allowed the thermal properties of the Disperse Orange 3 derivatives to be fine-tuned. (C) 2000 Elsevier Science Ltd. All rights reserved.
Phase Transfer Catalysis for Tandem Alkylation of Azo Dyes for the Synthesis of Novel Multifunctional Molecules
摘要:
Potentially photorefractive molecules, which possess both a charge transfer component and a nonlinear optical chromophore, were prepared by the direct N-monoalkylation of Disperse Orange 3 (1) with a carbazole alkyl bromide (2) utilizing phase transfer catalysis. Further N-alkylation of the remaining active N-H with alkyl halides with various chain lengths allowed the thermal properties of the Disperse Orange 3 derivatives to be fine-tuned. (C) 2000 Elsevier Science Ltd. All rights reserved.
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.