Asymmetric Anionic Polymerization of N-Substituted Maleimides with Et2Zn and Chiral Bisoxazolines
- 1 August 1998
- journal article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 27 (8) , 791-792
- https://doi.org/10.1246/cl.1998.791
Abstract
Anionic polymerizations of N-substituted maleimides (RMI:R=cyclohexyl (CHMI), R=phenyl (PhMI)) were achieved by chiral anionic initiator such as diethylzinc (Et2Zn)–chiral bisoxazoline (R′box) to afford optically active poly(RMI). The polymerizability was enhanced by the accelerated nucleophilicity of the ethyl groups in Et2Zn due to R′box ligands. The specific rotations of poly(PhMI) ([α]25435 −28.4 to + 94.6°) were much improved than those initiated by n- BuLi - R′box.This publication has 16 references indexed in Scilit:
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