Telomerization of 1,3-Butadiene with Carbon Dioxide: A Highly Efficient Process for δ-Lactone Generation
作者:João M. Balbino、Jairton Dupont、J. Carles Bayón
DOI:10.1002/cctc.201701058
日期:2018.1.9
A very efficient and selective telomerization of 1,3‐butadiene with CO2 that leads to the δ‐lactone (3‐ethylidene‐6‐vinyltetrahydro‐2H‐pyran‐2‐one) was obtained using palladium acetate and tris(p‐methoxyphenyl)phosphine as a catalyst in the presence of p‐hydroquinone, N,N‐diisopropylethylamine, and acetonitrile. A high turnover number of 4500 with 96 % selectivity to the δ‐lactone was obtained after
1,3-丁二烯的非常有效的和选择性的调聚反应用CO 2通向δ内酯(3-亚乙基-6-乙烯基四氢2 ħ用乙酸钯和三(获得吡喃-2-酮)p -在对苯二酚,N,N-二异丙基乙胺和乙腈存在下作为催化剂的甲氧基苯基)膦。在70°C下反应5小时后,获得了4,500的高周转率,对δ-内酯的选择性为96%。由于存在不同的1,3-二烷基咪唑鎓离子液体而使反应失活,可能是由于形成了稳定且无活性的钯-咪唑-2-亚烷基苯甲酸酯。