35333-26-7Relevant articles and documents
Method for synthesizing 4-(4-fluorobenzoyl) butyric acid and analogues thereof in continuous flow microreactor
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Paragraph 0059-0064, (2021/05/12)
The invention relates to a method for synthesizing 4-(4-fluorobenzoyl) butyric acid and analogues thereof in a continuous flow microreactor, which comprises the following steps: (1) uniformly mixing a compound 1 and a compound 2 to obtain a homogeneous phase solution A; (2) uniformly mixing aluminum trichloride, a compound 1 and an organic solvent to obtain a homogeneous phase solution B; (3) diluting concentrated hydrochloric acid with water to prepare a solution C; and (4) transferring the homogeneous phase solution A and the homogeneous phase solution B into a first micro-reaction module for a Friedel-Crafts acylation reaction, after the reaction is finished, transferring the obtained reaction solution and the solution C into a second micro-reaction module for quenching reaction, and then performing liquid separation, washing and vacuum concentration to obtain a target compound 3; wherein the specific synthesis route is as follows. By adopting the method disclosed by the invention, the target product can be continuously and rapidly synthesized, aluminum trichloride is not needed for treatment, the reaction condition is mild, the reaction time is short, and the yield is high and reaches 90% or above.
Iridium-Catalyzed Asymmetric Hydrogenation of ?- A nd ?-Ketoacids for Enantioselective Synthesis of ?- A nd ?-Lactones
Hua, Yun-Yu,Bin, Huai-Yu,Wei, Tao,Cheng, Hou-An,Lin, Zu-Peng,Fu, Xing-Feng,Li, Yuan-Qiang,Xie, Jian-Hua,Yan, Pu-Cha,Zhou, Qi-Lin
supporting information, p. 818 - 822 (2020/02/15)
A highly efficient asymmetric hydrogenation of ?- A nd ?-ketoacids was developed by using a chiral spiro iridium catalyst (S)-1a, affording the optically active ?- A nd ?-hydroxy acids/lactones in high yields with excellent enantioselectivities (up to >99% ee) and turnover numbers (TON up to 100000). This protocol provides an efficient and practical method for enantioselective synthesis of Ezetimibe.
Aryl Boronic Acid Catalysed Dehydrative Substitution of Benzylic Alcohols for C?O Bond Formation
Estopi?á-Durán, Susana,Donnelly, Liam J.,Mclean, Euan B.,Hockin, Bryony M.,Slawin, Alexandra M. Z.,Taylor, James E.
supporting information, p. 3950 - 3956 (2019/02/16)
A combination of pentafluorophenylboronic acid and oxalic acid catalyses the dehydrative substitution of benzylic alcohols with a second alcohol to form new C?O bonds. This method has been applied to the intermolecular substitution of benzylic alcohols to form symmetrical ethers, intramolecular cyclisations of diols to form aryl-substituted tetrahydrofuran and tetrahydropyran derivatives, and intermolecular crossed-etherification reactions between two different alcohols. Mechanistic control experiments have identified a potential catalytic intermediate formed between the aryl boronic acid and oxalic acid.