Metal-salen Molecular Cages As Efficient and Recyclable Heterogeneous Catalysts for Cycloaddition of CO with Epoxides Under Ambient Conditions

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2019 Feb 28

PMID 30809373

Citations 3

Authors

Chee Koon Ng

Ren Wei Toh

Ting Ting Lin

He-Kuan Luo

T S Andy Hor

Jie Wu

Affiliations

Soon will be listed here.

Abstract

A salen based molecular cage, salen@cage, was synthesized and complexed with Co and Al to yield metal-salen molecular cages, Co(ii)@cage, Co(iii)@cage and Al(iii)@cage. These cages were demonstrated to be efficient heterogeneous catalysts for the cycloaddition of CO with styrene oxide, achieving full conversion at 25 °C and 1 atm CO. Good to excellent yields of various cyclic carbonates were also achieved under mild conditions. Al(iii)@cage can be reused up to five times without any significant loss of its high catalytic activity. The capability to access a variety of heterogeneous organometallic catalysts with salen@cage offers new prospects for practical CO utilization and chemical manufacturing.

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