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Hydrodeoxygenative Cyclotetramerization of Carbon Monoxide by a Trinuclear Titanium Polyhydride Complex by Hu, Shaowei; Shima, Takanori; Hou, Zhaomin is a Chemistry article available to read on EtoBox.

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The reductive coupling of carbon monoxide (CO) by metal hydrides is of fundamental interest and practical importance. Herein we report an unprecedented hydrodeoxygenative cyclotetramerization of CO by a trinuclear titanium polyhydride complex [(CMeSiMe)Ti](μ-H)(μ-H) (). The reaction of CO with at -78 °C gave an ethen-1,2-diyl species [CH═CH] through the hydrodeoxygenative dimerization of two molecules of CO, which upon cycloaddition to another two molecules of CO afforded a cyclobuten-3,4-diyl-1,2-diolate unit [CHO]. The hydrogenolysis of the [CHO] species with H yielded a tetrahydrocyclobuten-1,2-diolate species [CHO], which on heating at 100 °C gave a cyclobuten-2-yl-1-olate product [CHO]. The acidolysis of the [CHO] and [CHO] species with HCl afforded γ-butyrolactone and cyclobutanone, respectively.

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Author

Hu, Shaowei; Shima, Takanori; Hou, Zhaomin

Publisher

American Chemical Society; American Chemical Society (ACS); Research Square (ISSN 0002-7863)

Published

2020

Language

EN

Field

Chemistry (Physical Sciences)