New Synthetic Approach for Optically Active Polymer Bearing Chiral Cyclic Architecture: Combination of Asymmetric Allylic Amidation and Ring-Closing Metathesis Reaction
New Synthetic Approach for Optically Active Polymer Bearing Chiral Cyclic Architecture: Combination of Asymmetric Allylic Amidation and Ring-Closing Metathesis Reaction
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具有手性环状结构的光学活性聚合物的新合成方法:不对称烯丙基酰胺化和闭环复分解反应的组合
DOI:
10.1021/acs.macromol.5b02067
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发表时间:
2015
期刊:
影响因子:
5.5
通讯作者:
and K. Onitsuka
中科院分区:
文献类型:
--
作者:
N. Kanbayashi;T. Okamura;and K. Onitsuka
A new synthetic approach for optically active polymer-bearing chiral cyclic architecture is described. The polymer is prepared by a combination of asymmetric allylic amidation catalyzed by planar-chiral ruthenium (Cp′Ru) complexes and ring-closing metathesis (RCM) reaction. We have designed bifunctional monomers bearing allylic chloride andN-alkoxyamide possessing an olefinic moiety, and the resulting polymer provides two olefinic moieties for RCM reactions in each monomer unit. These monomers are smoothly polymerized by Cp′Ru catalyst with quantitative conversion to afford the desired optically active polymer with high regio- and enantioselectivities. The resulting polymer is easily converted to one chiral cyclic structure (3,6-dihydro-2H-oxazine) per monomer unit via RCM catalyzed by the second-generation Hoveyda–Grubbs catalyst. Additionally, the polymerization system is applicable to various monomers, which afford optically active polymers possessing several types of main chain and side chain structures.
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影响因子:
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通讯作者:
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影响因子:
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DOI:
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影响因子:
5.5
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