Diels–Alder and Dehydration Reactions of Biomass-Derived Furan and Acrylic Acid for the Synthesis of Benzoic Acid
作者:Eyas Mahmoud、Jingye Yu、Raymond J. Gorte、Raul F. Lobo
DOI:10.1021/acscatal.5b01892
日期:2015.11.6
product was dehydrated at low temperatures (298 to 353 K) in mixtures of methanesulfonic acid and aceticanhydride in 96% yield. This is compared to an only 1.7% yield of methyl benzoate obtained for the dehydration of the oxanorbornene in neat methanesulfonic acid. The effect of oxanorbornene concentration and stereochemistry was found not to decrease the yield of aromatics, while dehydration of the carboxylic
据报道,从呋喃(高产率地由半纤维素获得)和丙烯酸甲酯可以生成苯甲酸。这些路线涉及Diels–Alder和呋喃与丙烯酸(或丙烯酸甲酯)的脱水反应,分两步进行,以最大程度地减少副反应。呋喃与丙烯酸甲酯(或丙烯酸)的狄尔斯-阿尔德反应在298 K下进行,并由路易斯酸性(Hf-,Zr-和Sn-Beta)沸石催化剂催化,并实现了高周转率(〜2) h –1),未观察到任何副反应。在较低的温度下(298至353 K),将氧杂降冰片烯产物在甲磺酸和乙酸酐的混合物中脱水,收率为96%。这与在纯甲磺酸中将氧杂降冰片烯脱水而获得的仅1.7%的苯甲酸甲酯的收率进行了比较。发现氧杂降冰片烯浓度和立体化学的影响不会降低芳族化合物的产率,而氧杂降冰片烯的羧酸形式的脱水导致在甲烷磺酸和乙酸酐的混合物中完全转化时选择性降低至43%。该反应序列可能是重要的切入点,用于选择性地将高产率,半纤维素衍生的呋喃引导至现有化学加工工业中使用的芳族产品。
US4828603A
申请人:——
公开号:US4828603A
公开(公告)日:1989-05-09
Herbicidal oxatricyclo-nonane ethers
申请人:E. I. Du Pont de Nemours and Company
公开号:US04828603A1
公开(公告)日:1989-05-09
The present invention relates to novel tricyclo ether derivative compounds, to compositions containing these ether derivative compounds, and to methods of using these compounds or compositions to control the growth of undesired vegetation.