期刊
DALTON TRANSACTIONS
卷 51, 期 41, 页码 15631-15643出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt02509d
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资金
- Carbon Recycling Fund Institute (CRF) [FY2021]
The utilization of carbon dioxide in chemical materials has gained attention for its potential contribution to the reduction of CO2 emissions and mitigating climate change. A practical and environmentally friendly method for the synthesis of various organic carbamates from CO2, including industrially important diisocyanate precursors, using alkoxysilanes is proposed.
It is well known that the utilization of carbon dioxide (CO2) for chemical materials is attracting research attention from the viewpoint of the carbon cycle. To contribute to the reduction of CO2 emission through such CO2 utilization reactions and counteract global climate change, the target compounds should be core chemical products that are distributed in large quantities and used for a long time. One such synthetic target is isocyanates that are used as raw materials for the production of polyurethanes, which are versatile polymeric materials with a service life of approximately 10 years. However, since direct synthesis of isocyanate from CO2 is quite difficult due to equilibrium constraints, a method via the use of its alcohol adduct, organic carbamate, as a precursor has been proposed. In this Perspective, we present regenerative metal alkoxide reactants, such as tin alkoxide, titanium alkoxide, and alkoxysilane, as environmentally benign reactants for the synthesis of organic carbamates from CO2. We also present a practical and environmentally friendly method for the highly efficient synthesis of various organic carbamates, including industrially important diisocyanate precursors, from 1 atm CO2 using alkoxysilanes. Furthermore, prospects for the practical application of these carbamate synthesis reactions are also discussed.
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