手性聚氨酯的合成：通向π堆积的2/1螺旋聚合物和环状化合物
Chiral Polyurethane Synthesis Leading to π-Stacked 2/1-Helical Polymer and Cyclic Compounds.
作者信息
Gudeangadi Prashant G, Sakamoto Takeshi, Shichibu Yukatsu, Konishi Katsuaki, Nakano Tamaki
机构信息
Catalysis Research Center (CRC) and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N21, W10, Kita-ku, Sapporo 001-0021, Japan.
Faculty of Environmental Earth Sciences, Hokkaido University, N10, W5, Kita-ku, Sapporo 060-0810, Japan.
出版信息
ACS Macro Lett. 2015 Sep 15;4(9):901-906. doi: 10.1021/acsmacrolett.5b00477. Epub 2015 Aug 12.
()-1,1'-Bi(2-naphthol) was reacted with 1,4-phenylene diisocyanate leading to a mixture of linear polyurethane and cyclic compounds including a cyclic dimer and a cyclic trimer. The structure of the cyclic dimer was elucidated by X-ray crystal structure analysis. The polymer was proposed to possess a rather stiff, π-stacked, 2/1-helical conformation on the basis of NMR, CD, and UV spectra and molecular dynamics simulations. The conformation was stable in the range of temperature of 0-60 °C.
（-）-1,1'-联（2-萘酚）与1,4-亚苯基二异氰酸酯反应，生成线性聚氨酯和环状化合物的混合物，其中包括环状二聚体和环状三聚体。通过X射线晶体结构分析阐明了环状二聚体的结构。基于核磁共振、圆二色光谱和紫外光谱以及分子动力学模拟，推测该聚合物具有相当刚性的、π堆积的2/1-螺旋构象。该构象在0-60°C的温度范围内稳定。
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