Optically Active Poly-and Oligo(biphenyl carbonate)s as Stable Helical Molecules

Optically Active Poly-and Oligo(biphenyl carbonate)s as Stable Helical Molecules
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作为稳定螺旋分子的光学活性多聚和寡聚(碳酸联苯)

DOI:
10.1246/cl.1999.93
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发表时间:
1999
期刊:
影响因子:
--
通讯作者:
T. Takata
T. Takata
中科院分区:
--
文献类型:
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作者:
K. Murakawa;Yoshio Furusho;T. Takata

文献摘要

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由(R)-4,4-Mobi,6,6 ′-四甲基-2,2 ′-二羟基联苯((R)-3)缩聚得到的低分子量聚碳酸酯((R)-2)在210 nm处显示出比其单元模型更大的Cotton效应。通过分步合成得到的(R)-2(2- 8聚体)模型寡聚体的圆二色性谱和结构模拟表明,(R)-2及更高的寡聚体能保持稳定的左旋螺旋。
Low molecular weight polycarbonate ((R)-2) derived from polycondensation of (R)-4,4′,6,6′-tetramethyl-2,2′-dihydroxybiphenyl ((R)-3) showed large Cotton effect at 210 nm compared with its unit model. CD spectra of model oligomers of (R)-2 (2-8mers) obtained by stepwise synthesis and their structure simulation suggested that (R)-2 and higher oligomers can hold a stable left-handed helix.