telomerization of CO2 and butadiene. The key for the selective valorization of 1 is the use of a catalytic system based on PdCl2, a chelating phosphine bearing electron-withdrawing groups and an acidic promoter. The unsaturated C10 methyl diester can be easily hydrogenated on Pd/C under mild conditions to afford its corresponding saturated diester. Subsequent hydrogenation using the homogeneous [Ru(acac)3]/Triphos
申请人:QATAR FOUNDATION FOR EDUCATION, SCIENCE AND COMMUNITY DEVELOPMENT
公开号:US10519094B2
公开(公告)日:2019-12-31
The metal-catalyzed alkoxycarbonylation of a lactone is a method of alkoxycarbonylating a δ-lactone, specifically 3-ethylidene-6-vinyltetrahydro-2H-pyran-2-one. The method includes combining the δ-lactone with an alcohol in an organic solvent in the presence of a catalyst system that includes palladium or a salt thereof to form a reaction mixture, which is heated to 110-130° C. at a pressure of 20-50 bar for between 3-5 hours under flow of carbon monoxide gas. The product of the reaction is a substituted 2-octendioate diester. The alcohol may be methyl alcohol, n-butyl alcohol, 2-ethylhexanol, isobutyl alcohol, isopropyl alcohol, benzyl alcohol, or phenol. The solvent may be toluene, acetonitrile, or tetrahydrofuran. The method may include adding an acid to the reaction mixture, which may be dilute (about 5 mol %) sulfuric or p-toluenesulfonic acid. The catalyst system may also include a phosphine ligand.
Synthesis of building blocks and feedstocks for manufacturing renewable polymers
申请人:Qatar Foundation for Education, Science and Community Development
公开号:US11312677B2
公开(公告)日:2022-04-26
Disclosed are methods or processes of synthesizing building blocks and feedstocks for producing a broader range of polymers, including renewable polymers, from renewable resources such as CO2. In a process of manufacturing a renewable feedstock for polymer production, a CO2 derived lactone is prepared and processed to form the renewable feedstock. The process may include alkoxycarbonylation of the CO2 derived lactone to form a diester and hydrogenation of the diester.
本发明公开了利用二氧化碳等可再生资源合成用于生产包括可再生聚合物在内的多种聚合物的构件和原料的方法或工艺。在生产聚合物用可再生原料的工艺中,制备和加工二氧化碳衍生内酯以形成可再生原料。该工艺可包括 CO2 衍生内酯的烷氧基羰基化以形成二酯,以及二酯的氢化。
Synthesis of glycols from conjugated aliphatic diolefins
申请人:NAT DISTILLERS CHEM CORP
公开号:US02850539A1
公开(公告)日:1958-09-02
METAL-CATALYZED ALKOXYCARBONYLATION OF A LACTONE
申请人:Qatar Foundation for Education,
Science and Community Development