ASYMMETRIC AND ENANTIOMER-SELECTIVE POLYMERIZATION OF PHENYL-2-PYRIDYL-ORTHO-TOLYLMETHYL METHACRYLATE

被引：16

作者：

YASHIMA, E ^{[1
]}

OKAMOTO, Y ^{[1
]}

HATADA, K ^{[1
]}

机构：

[1] OSAKA UNIV,FAC ENGN SCI,DEPT CHEM,TOYONAKA,OSAKA 560,JAPAN

来源：

POLYMER JOURNAL | 1987年 / 19卷 / 07期

关键词：

CHROMATOGRAPHIC ANALYSIS - COPOLYMERS - POLYMERIZATION - Copolymerization - POLYMERS - Analysis;

D O I：

10.1295/polymj.19.897

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The enantiomer-selective (asymmetric selective or stereoelective) polymerization of a bulky racemic monomer phenyl-2-pyridyl-o-tolylmethyl methacrylate (PPyTMA) was investigated with chiral anionic initiators, the complexes of 2,3-dimethoxy-1,4-bis(dimethylamino)butane (DDB) with fluorenyllithium or N,N prime -diphenylethylenediamine monolithium amide, in toluene at minus 78 degree C. ( minus )-Isomer was consumed preferentially over ( plus ) -isomer when ( minus )-DDB was used as a chiral ligand and a highly isotactic polymer was obtained. The initiators showed no enantiomer selectivity in the polymerization of less bulky racemic methacrylates, such as 1-phenylethy methacrylate and 1,2-diphenylethyl methacrylate which afforded atactic polymers.

引用

页码：897 / 904

页数：8