Highly Active Yttrium Catalysts for the Ring-Opening Polymerization of 蔚-Caprolactone and 未-Valerolactone

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• 作者：Xinke Wang ; Jonathan L. Brosmer ; Arnaud Thevenon ; Paula L. Diaconescu
• 刊名：Organometallics
• 出版年：2015
• 出版时间：October 12, 2015
• 年：2015
• 卷：34
• 期：19
• 页码：4700-4706
• 全文大小：436K
• ISSN：1520-6041

文摘

The activity of several yttrium alkoxide and aryloxide complexes supported by a ferrocene-based ligand incorporating two thiol phenolates, thiolfan (1,1鈥?bis(2,4-di-tert-butyl-6-thiomethylenephenoxy)ferrocene), was studied. The tert-butoxide complex could only be isolated in the ate form, while a monophenoxide complex could be obtained for OAr = 2,6-di-tert-butylphenolate. The synthetic utility of these yttrium complexes has been demonstrated by the ring-opening polymerization of cyclic esters, with a high activity toward 蔚-caprolactone and 未-valerolactone being found for the yttrium phenoxide complex.