Synthesis of isotactic poly[α-(hydroxymethyl)acrylate] by anionic polymerization of the protected monomer

Synthesis of isotactic poly[α-(hydroxymethyl)acrylate] by anionic polymerization of the protected monomer
复制标题

受保护单体阴离子聚合合成全同立构聚[α-(羟甲基)丙烯酸酯]

DOI:
10.1007/s00289-016-1813-1
复制
发表时间:
2017
期刊:
影响因子:
3.2
通讯作者:
Tatsuki Kitayama
Tatsuki Kitayama
中科院分区:
化学3区
文献类型:
--
作者:
Yasuhiro Kohsaka;Kazuki Yamamoto;Kazuha Suzawa;Tatsuki Kitayama

文献摘要

参考文献

相似文献

全同立构聚[甲基α-(羟甲基)丙烯酸酯]是通过在-78 °C下在甲苯中用α-锂代异丁酸异丙酯(Li-iPrIB)引发的三甲基甲硅烷基(1-TMS)保护的相应单体的阴离子聚合来制备的。与α-(烷氧基甲基)丙烯酸酯的情况类似,聚合以高全同立构特异性进行,尽管由于伴随三甲基硅烷醇阴离子消除的自终止反应,单体转化率低(~ 18%)。单体转化率可提高到约10%。75%,在聚合与过量的LiOSiMe 3,这将相互作用和稳定的增长物种,以抑制自终止反应。这与缩醛保护的单体α-(甲氧基甲氧基甲基)丙烯酸酯(1-CH 3)的聚合形成鲜明对比,其中LiOSiMe 3的加入增强了自终止。因此,保护基的结构影响聚合行为。对于所得聚(1-TMS),酸水解脱保护定量地得到全同立构聚[α-(羟甲基)丙烯酸甲酯]。
Isotactic poly[methyl α-(hydroxymethyl)acrylate] was prepared via anionic polymerization of the respective monomer protected with trimethylsilyl group (1-TMS) initiated with isopropyl α-lithioisobutyrate (Li-iPrIB) in toluene at −78 °C. The polymerization proceeded in high isotactic specificity similarly to the case of α-(alkoxymethyl)acrylate, although the monomer conversion was low (~18 %) due to the self-terminating reaction accompanying the elimination of trimethylsilanolate anion. The monomer conversion could be improved to ca. 75 % in the polymerizations with an excess amount of LiOSiMe3, which would interact with and stabilize the propagating species to suppress the self-terminating reaction. This was a sharp contrast to the polymerization of α-(methoxymethoxymethyl)acrylate (1-MOM), an acetal protected monomer, where the addition of LiOSiMe3enhanced the self-termination. Consequently, the structure of protective group affects the polymerization behavior. For the resultingpoly(1-TMS), the deprotection by acid hydrolysis quantitatively afforded isotactic poly[methyl α-(hydroxymethyl)acrylate].
α-(甲氧基甲基)丙烯酸苄酯的立体定向聚合
DOI: 10.1021/ma951664
发表时间: 1996
期刊: Macromolecules
影响因子: 5.5
作者:
S. Habaue;H. Yamada;Y. Okamoto
通讯作者: Y. Okamoto
DOI: 10.1002/pola.20991
发表时间: 2005
期刊: Journal of Polymer Science Part A
影响因子: --
作者:
T. Y. Chiu;M. Stenzel;T. P. Davis;C. Barner‐Kowollik
通讯作者: C. Barner‐Kowollik
α-(羟甲基)丙烯酸乙酯
DOI: 10.1002/047084289x.re090
发表时间: 2001
期刊: Organic Syntheses
影响因子: 0.7
作者:
J. Villiéras;M. Villiéras
通讯作者: M. Villiéras
DOI: 10.1002/pola.27931
发表时间: 2016
期刊: Journal of Polymer Science Part A
影响因子: --
作者:
Yasuhiro Kohsaka;Y. Matsumoto;Tianyi Zhang;Y. Matsuhashi;T. Kitayama
通讯作者: T. Kitayama
Koichi Hatada、Koichi Ute、Tohru Nishimura、Masaharu Kashiyama、Toshinori Saito 和 Makoto Takeuchi:“甲基丙烯酸甲酯的立构规整低聚物。4. MMA 的等规和间规低聚物的超临界流体色谱法”聚合物子弹
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
通讯作者: --