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.
Photoacid generators and lithographic resists comprising the same
申请人:University Of North Carolina At Charlotte
公开号:US10310375B2
公开(公告)日:2019-06-04
The present invention provides photoacid generators for use in chemically amplified resists and lithographic processes using the same.
本发明提供了用于化学放大抗蚀剂的光酸发生器以及使用光酸发生器的光刻工艺。
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.
Synthesis of expanded calix[n]pyrroles and their furan or thiophene analogues
作者:Arumugam Nagarajan、Jae-Won Ka、Chang-Hee Lee
DOI:10.1016/s0040-4020(01)00719-0
日期:2001.8
gen-like mixed cyclic oligomers containing furans, pyrroles and thiophenes have been synthesized by ‘3+1’, ‘3+2’ and ‘3+ketone’ approaches. Condensation of 2,5-bis[1-methyl-1(1H-pyrrol-2-yl)-ethyl]furan with 2,5-bis[(α-hydroxy-α,α-dimethyl)furan or 2,5-bis[(α-hydroxy-α,α-dimethyl)thiophene resulted in the formation of the mixture of cyclic tetramer, cyclic octamer and cyclichexamer possessing different
Synthesis of oligopyrrolic cluster bearing thiophene spacer as potential anion receptors
作者:Dong-Hoon Won、Chang-Hee Lee
DOI:10.1016/s0040-4039(03)01625-3
日期:2003.8
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.