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Chiral oligomers of spiro-salencobalt(III)X for catalytic asymmetric cycloaddition of epoxides with CO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
49774 46765 2016 4 PDF Available
Title
Chiral oligomers of spiro-salencobalt(III)X for catalytic asymmetric cycloaddition of epoxides with CO2
Abstract

•Several new chiral oligomers of spiro-salenCo(III)X catalysts were synthesized.•The spiro backbones were first applied to produce chiral cyclic carbonates.•These chiral catalysts could be easily recovered and reused.

Several new chiral oligomers of spiro-salenCo(III)X (spiro = 1.1′-spirobiindane-7.7′-diol) complexes have been designed, synthesized, and characterized by nuclear magnetic resonance (NMR), infrared (IR), and elemental analyses, in which, the chiral spiro moieties are first introduced into a scaffold of chiral salenCo catalysts. They were used to catalyze the asymmetric cycloaddition of epoxides with carbon dioxide. Under very mild reaction conditions, a kinetic resolution of racemic epoxides with CO2 was smoothly initiated by these chiral oligomer catalysts with good enantioselectivities, which can be attributed to the match effect between chiral backbones of salen and spiro. High stability and easy recyclability are their major advantages.

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Keywords
Asymmetric cycloaddition; Chiral oligomer catalyst; Carbon dioxide; Epoxide; Kinetic resolution
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Chiral oligomers of spiro-salencobalt(III)X for catalytic asymmetric cycloaddition of epoxides with CO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 81, 5 June 2016, Pages 50–53
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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