2550-04-1Relevant articles and documents
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Bailey,Pines
, p. 2363,2365 (1954)
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Sustainable Catalytic Synthesis of Diethyl Carbonate
Putro, Wahyu S.,Ikeda, Akira,Shigeyasu, Shinji,Hamura, Satoshi,Matsumoto, Seiji,Lee, Vladimir Ya.,Choi, Jun-Chul,Fukaya, Norihisa
, p. 842 - 846 (2020/12/07)
New sustainable approaches should be developed to overcome equilibrium limitation of dialkyl carbonate synthesis from CO2 and alcohols. Using tetraethyl orthosilicate (TEOS) and CO2 with Zr catalysts, we report the first example of sustainable catalytic synthesis of diethyl carbonate (DEC). The disiloxane byproduct can be reverted to TEOS. Under the same conditions, DEC can be synthesized using a wide range of alkoxysilane substrates by investigating the effects of the number of ethoxy substituent in alkoxysilane substrates, alkyl chain, and unsaturated moiety on the fundamental property of this reaction. Mechanistic insights obtained by kinetic studies, labeling experiments, and spectroscopic investigations reveal that DEC is generated via nucleophilic ethoxylation of a CO2-inserted Zr catalyst and catalyst regeneration by TEOS. The unprecedented transformation offers a new approach toward a cleaner route for DEC synthesis using recyclable alkoxysilane.
NOVEL SILICON COMPOUND AND POLYMER
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Paragraph 0048-0050, (2016/10/07)
PROBLEM TO BE SOLVED: To provide novel silicon compounds and polymers. SOLUTION: This invention provides a compound represented by the following chemical formula (1), where Z is an allyl group, Ar is an aromatic hydrocarbon group, all or part of hydrogen atoms on an aromatic ring of the aromatic hydrocarbon group may be replaced by a halogen atom or an alkyl group having 1-8 carbon atoms, m is an integer of 1-4, n is an integer of 0-3, m+n=4, and if n is 2-3, a plurality of Ars may be the same or different. COPYRIGHT: (C)2016,JPOandINPIT
