Organic spirocyclic initiators for the ring-expansion polymerization of β-lactones

被引：180

作者：

Jeong, Wonhee

Hedrick, James L.

Waymouth, Robert M. ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 27期

关键词：

D O I：

10.1021/ja072037q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report spirocyclic imidazolidines derived from N-heterocyclic carbenes and beta-lactones. These spirocycles are initiators for the zwitterionic ring-expansion polymerization of beta-lactones to generate cyclic polyesters of well-defined molecular weight. The zwitterionic strategy based on the equilibrium between the zwitterionic intermediates and spiro macrocyclics enables the controlled synthesis of cyclic poly(beta-lactone)s

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页码：8414 / +

页数：3

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