Asymmetrie selection polymerization of (RS)-?-methylbenzyl methacrylate with axially chiral catalysts prepared from grignard reagents and biphenyl derivates
この論文をさがす
説明
Asymmetric selection (stereoelection) polymerization of racemic α-methylbenzyl methacrylate (MBMA) was investigated by using axially dissymmetric catalysts in toluene. The catalysts of binary system, which were prepared in situ from optically pure 2,2′-diamino-6,6′-dimethylbiphenyl (1) or its N-methylated derivatives and Grignard reagents (RMgX). The selection depended upon not only the kinds of the amines and RMgX but also the molar ratios. Among the catalysts examined, cyclohexylmagnesium bromide (cHexMgBr) — (R)-1 [1.5/1.0 molar ratio] system gave the best selection and it polymerized (S)-monomer preferentially over (R)-antipode.
収録刊行物
-
- Polymer Bulletin
-
Polymer Bulletin 10-10 1983-01-01
Springer Science and Business Media LLC