Synthesis of an optically active polymer containing a planar phthalimide backbone by asymmetric polymerization
Synthesis of an optically active polymer containing a planar phthalimide backbone by asymmetric polymerization
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通过不对称聚合合成含有平面邻苯二甲酰亚胺主链的光学活性聚合物
DOI:
10.1039/d0py01073a
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发表时间:
2020
影响因子:
4.6
通讯作者:
Onitsuka Kiyotaka
中科院分区:
文献类型:
--
作者:
Kanbayashi Naoya;Saegusa Marina;Ishido Yuki;Okamura Taka-aki;Onitsuka Kiyotaka
Asymmetric polymerization is a promising method for constructing sophisticated backbones that contain asymmetric carbons on the main chain. Herein, we report the precise design and synthesis of a novel polymer backbone that induces a helical structure through asymmetric polymerization reactions of a phthalimide-based monomer catalyzed by a planar-chiral cyclopentadienyl–ruthenium complex. When sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate was used as an additive, the polymerization proceeded with high regio- and enantioselectivity, producing an optically active polymer composed of a planar phthalimide backbone with enantiomerically enriched asymmetric carbons on the main chain. The terminal olefin in each monomer unit of the polymer could take on various substituents through thiol–ene reactions. CD and UV spectroscopic methods and conformational studies showed that the planar phthalimide backbones are tightly folded according to the local conformation determined by the two torsion angles around the asymmetric carbons of the main chain, resulting in the construction of a cylindrical 41-helical structure in solution, which was stable in polar solvents due to the solvophobic effect on the phthalimide backbones.
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DOI:
10.1295/koron.2017-0027
发表时间:
2017
期刊:
影响因子:
--
作者:
N. Kanbayashi
通讯作者:
N. Kanbayashi
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Y. Matsushima;Nobuko Komatsuzaki;Yoshiki Ajioka;Mari Yamamoto;Hidetomo Kikuchi;Yasuyuki Takata;Noriko Dodo;K. Onitsuka;M. Uno;Shigetoshi Takahashi
通讯作者:
Shigetoshi Takahashi
影响因子:
5.5
作者:
T. Okamura;Shuichiro Seno
通讯作者:
Shuichiro Seno
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
Koichi Kamahori;Shoichi Tada;Koichi Ito;S. Itsuno
通讯作者:
S. Itsuno
影响因子:
18.3
作者:
Horne, W. Seth;Gellman, Samuel H.
通讯作者:
Gellman, Samuel H.