372186-81-7Relevant academic research and scientific papers
Production of Diethyl Terephthalate from Biomass-Derived Muconic Acid
Lu, Rui,Lu, Fang,Chen, Jiazhi,Yu, Weiqiang,Huang, Qianqian,Zhang, Junjie,Xu, Jie
supporting information, p. 249 - 253 (2016/01/25)
We report a cascade synthetic route to directly obtain diethyl terephthalate, a replacement for terephthalic acid, from biomass-derived muconic acid, ethanol, and ethylene. The process involves two steps: First, a substituted cyclohexene system is built through esterification and Diels-Alder reaction; then, a dehydrogenation reaction provides diethyl terephthalate. The key esterification reaction leads to improved solubility and modulates the electronic properties of muconic acid, thus promoting the Diels-Alder reaction with ethylene. With silicotungstic acid as the catalyst, nearly 100 % conversion of muconic acid was achieved, and the cycloadducts were formed with more than 99.0 % selectivity. The palladium-catalyzed dehydrogenation reaction preferentially occurs under neutral or mildly basic conditions. The total yield of diethyl terephthalate reached 80.6 % based on the amount of muconic acid used in the two-step synthetic process.
Metal carbenoid mediated ring opening of furan-2-yloxy derivatives. Stereoselective synthesis of 2,4-hexadienedioic acid and 6-aryl-1-oxo-2,4-hexadienoic acid derivatives
Shieh, Po Chuen,Ong, Chi Wi
, p. 7303 - 7307 (2007/10/03)
2-Methoxy- and 2-trimethylsilyloxyfuran undergo facile ring opening reaction upon treatment with metal carbenoid. Treatment of 2-methoxyfuran with ethyl diazoacetate and aryl-α-diazocarbonyl compounds under metal catalysis afforded (2Z,4E)-hexadienedioate
