Three Mechanisms of Asymmetric Polymerization of Phenylacetylenes Having an <scp>l</scp>-Amino Ether Residue and Two Hydroxy Groups
作者:Hongge Jia、Masahiro Teraguchi、Toshiki Aoki、Yunosuke Abe、Takashi Kaneko、Shingo Hadano、Takeshi Namikoshi、Tomoyuki Ohishi
DOI:10.1021/ma101424x
日期:2010.10.26
observed for the polymers having an l-valinol residue produced by using (S)- and (R)-PEA as a cocatalyst, respectively, although the monomers had the same chirality. The two polymers having an l-alaninol or l-phenylalaninol residues obtained by using (S)- and (R)-PEA as a cocatalyst showed CD absorptions with identical signs. Therefore, we found that the chiral monomer having an l-valinol residue was suitable
具有从衍生的残基octyloxyethanolamine三个新型手性phenylacetylenes升氨基醇以及两个羟甲基的合成和由两个非手性催化剂((NBD)的Rh聚合+ [η 6 - (C 6 H ^ 5)乙-(C 6 H ^ 5)3 ]和[Rh(nbd)Cl] 2 /三乙胺(TEA))和手性催化体系([Rh(nbd)Cl] 2 /(S)-或(R)-苯乙胺((S)-或(R)-豌豆))。所有得到的聚合物在约430 nm波长处均表现出棉花效应。该观察表明,它们有过多的单手螺旋骨架。对于具有通过使用(S)-和(R)-PEA作为助催化剂生产的具有1-缬氨醇残基的聚合物,分别观察到正和负棉花效应,尽管这些单体具有相同的手性。通过使用(S)-和(R)-PEA作为助催化剂获得的具有1-丙氨醇残基或1-苯基丙氨醇残基的两种聚合物显示出具有相同符号的CD吸收。因此,我们发现,具有一个手性单体升-vali