An environmentally benign protocol for the synthesis of azoSchiff bases and itscomplex in short reaction time and high yield has been achieved. These Schiffbase compounds have been characterized by C, H, N elemental analyses, FT-IR and 1H NMR spectroscopy. The synthesized complex was characterized by atomic absorption spectrophotometry and elemental analyses.
TiO<sub>2</sub> nanotubes catalyzed the synthesis of azo-linked xanthenes under ultrasonic conditions
作者:Nader Ghaffari Khaligh、Sharifah Bee Abd Hamid、Taraneh Mihankhah
DOI:10.1080/24701556.2016.1241276
日期:2017.7.3
A series of new azo-linked xanthene derivatives was synthesized via the eco-friendly multi-component condensation of azo-linked salicylaldehyde derivatives and dimedone under ultrasound irradiation as green energy source in the presence of TiO2 nanotubes (TNTs) as suitable heterogeneous catalyst. TNTs have moderate surface areas (S-BET = 238 m(2)center dot g(-1)) and high physiochemical stability (> 250 degrees C). The yield of 74-87% was achieved within 10 min at room temperature. The current method has advantages such as the simple experimental procedure, green conditions, utilization of reusable TiO2 nanotubes catalyst, and good to excellent yield of products.