ID | 74499 |
Title Transcription | ポリマー コテイカ エコ ハンノウザイ ノ カイハツ : セイリ カッセイ ブンシ コウキノウセイ ブンシ ノ ジセダイ ゴウセイ ストラテジー
|
Title Alternative | Exploitation of Ecological Reagents Supported on Polymer Materials : New SyntheticStrategy of Biologically Active Molecules and Functional Materials
|
Author |
Kawamura, Yasuhiko
Department of Chemical Science and Technology Faculty of Engineering, The University of Tokushima
Tokushima University Educator and Researcher Directory
KAKEN Search Researchers
Tezuka, Yoshihiko
Department of Optical Science and Technology Faculty of Engineering, The University of Tokushima
KAKEN Search Researchers
|
Keywords | Polymer-Supported Reagents
Isofavonoids
Fullerenes
Thermoresponsive Polymer
Gel
|
Content Type |
Departmental Bulletin Paper
|
Description | Chalcones with the 2’-benzoyloxy group can be transformed into the corresponding isoflavones by action
of polymer-supported IBD (PSIBD, poly[4-(diacetoxy)iodo]styrene) with TsOH. The advantage of the reaction is no liberation of PhI and reuse of the reagent. Meanwhile, fulleropyrrolidines have been very welcomed in a community of a fullerene science. But sometimes the synthesis ends up with disappointing yields of the products. We found that the dipolar cycloaddition of an azomethine ylide, i.e., 2-phenyl-N-benzylideneglycine methyl ester, supported on a Wang resin, proceeded feasibly with C60 and the objective fulleropyrrolidines were afforded in good yields (>75%). The method is expected to be utilized with wide range of application and it is therefore able to provide a compound library of modified fullerenes which is hard to be obtained by other methods employed so far. In order to introduce carboxyl groups into a thermoresponsive dehydroalanine polymers and hydrogels, N-isobutyryldehydroalanine methyl ester (iBDHAM) were copolymerized with its carboxylic acid derivative (iBDHA) for linear polymers and with a bisdehydroalanine derivative, N,N’-succinylbisdehydroalanine (SBDHA) for hydrogels. The linear copolymer, P(iBDHA-co-iBDHAM) ([iBDHA]=23-81%), showed LCST behavior in deionized water, but the LCST values were highly polymer concentration-dependent. It is concluded that effect of carboxyl groups introduced into the polymer chain is larger in hydrogels than in linear polymer. This is probably due to the effect of dissociative carboxyl groups on the osmotic pressure of hydrogels. |
Journal Title |
徳島大学工学部研究報告
|
ISSN | 03715949
|
NCID | AA1221470X
|
Volume | 49
|
Published Date | 2004
|
FullText File | |
language |
jpn
|
departments |
Science and Technology
|