An efficient protocol for the one-pot multicomponent synthesis of various 2,4,5 -triaryl- 1H-imidazoles and 1,2,4,5 -tetraaryl- 1H- imidazoles using PEG-400 as reaction medium is described. This method has the advanta...An efficient protocol for the one-pot multicomponent synthesis of various 2,4,5 -triaryl- 1H-imidazoles and 1,2,4,5 -tetraaryl- 1H- imidazoles using PEG-400 as reaction medium is described. This method has the advantages of good yields, less pollution and simple reaction conditions.展开更多
Three tetraaryl imidazole derivatives 5a-5c bearing thiazole groups were synthesized in the presence of [Bmin]Br by one-pot reaction and their structures were fully characterized by the H NMR, IR, MS and elemental ana...Three tetraaryl imidazole derivatives 5a-5c bearing thiazole groups were synthesized in the presence of [Bmin]Br by one-pot reaction and their structures were fully characterized by the H NMR, IR, MS and elemental analysis. The results of UV-vis spectra and fluorescent spectra upon metal ions complexation show that compound 5a displays high selectivity and sensitivity for Cr3＋ ions. The complexation ratio of compound 5a and Cr3＋ is 1：1.展开更多
Synthesis and ring-opening reaction of TADDOL analogue with cyclopropane as chiral backbone were described. A plausible ring-opening and carbonium ion rearrangement mechanism have been proposed.
基金support from the Natural Science Foundation of Gansu Province(No.3ZS061-A25-019)the Scientific Research Fund of Gansu Provincial Education Department(No.0601-25).
文摘An efficient protocol for the one-pot multicomponent synthesis of various 2,4,5 -triaryl- 1H-imidazoles and 1,2,4,5 -tetraaryl- 1H- imidazoles using PEG-400 as reaction medium is described. This method has the advantages of good yields, less pollution and simple reaction conditions.
基金supported by the Science Fund for Young Scholars of Heilongjiang Province of China(No.QC2009C61)the Program for Young Teachers' Scientific Research at Qiqihar University(No.2012K-Z09)Qiqihar University Graduate Innovation Fund Grants(No.YJSCX2011-026X)
文摘Three tetraaryl imidazole derivatives 5a-5c bearing thiazole groups were synthesized in the presence of [Bmin]Br by one-pot reaction and their structures were fully characterized by the H NMR, IR, MS and elemental analysis. The results of UV-vis spectra and fluorescent spectra upon metal ions complexation show that compound 5a displays high selectivity and sensitivity for Cr3＋ ions. The complexation ratio of compound 5a and Cr3＋ is 1：1.
基金founded by the National Natural Science Foundation of China(No.20472111).
文摘Synthesis and ring-opening reaction of TADDOL analogue with cyclopropane as chiral backbone were described. A plausible ring-opening and carbonium ion rearrangement mechanism have been proposed.
