Synthesis of oligopyrrolic cluster bearing thiophene spacer as potential anion receptors
摘要:
The oligopyrrolic clusters and tripyrrylmethane have been synthesized and characterized by the utilization of 2-formylpyrroles and their derivatives as building blocks. Condensation of dialdehydes 9 with pyrrole in the presence of BF3(Et2O) resulted in the formation of tripyrrlymethane 10, while similar condensation performed in trifluoroacetic acid afforded oligopyrrolic cluster 11 on the other hand. The nature of substituents at meso-positions resulted in the formation of completely different products. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis of calix[n]furano[n]pyrroles and calix[n]thieno[n]pyrroles (n=2,3,4) by ‘3+1’ approach
作者:Yong-Sung Jang、Han-Je Kim、Phil-Ho Lee、Chang-Hee Lee
DOI:10.1016/s0040-4039(00)00294-x
日期:2000.4
Condensation of 5,5,10,10-tetramethyl-16-oxa-tripyrromethane and 2,5-bis[(alpha-hydroxy-alpha,alpha-dimethyl)methyl]furan or 2,5-bis[(alpha-hydroxy-alpha,alpha-dimethyl)methyl]thiophene resulted in cyclic, alternating oligomers of furan(thiophene) and pyrrole. The product distribution is independent of the reaction conditions, the presence of inorganic additives and temperature. (C) 2000 Elsevier Science Ltd. All rights reserved.