An efficient synthesis of (Z)-α-fluorochalcones via the palladium-catalyzed cross-coupling reaction of (Z)-α-fluorocinnamoyl chloride with boronic acids
An efficient synthesis of α-fluorochalcones (1,3-diphenyl-2-fluoroprop-2-en-1-one) based on the Suzuki–Miyaura palladium-catalyzed cross-coupling reaction of arylboronic acids with α-fluorocinnamoyl chlorides in the presence of Cs2CO3 in toluene is described. This approach allows the synthesis of fluorinated analogues of functionalized natural chalcones.
在存在的情况下,基于铃木-宫浦钯催化的芳基硼酸与α-氟肉桂酰氯的交叉偶联反应,可高效合成α-氟代查耳酮(1,3-二苯基-2-氟代丙-2-烯-1-酮)描述了甲苯中Cs 2 CO 3的含量。这种方法可以合成功能化天然查耳酮的氟化类似物。
hydrogermanes. This methodology provides an efficient and robust approach for producing various germylated monofluoroalkenes with excellent stereoselectivity within a brief photoirradiation period. The feasibility of this reaction has been demonstrated through gram-scale reaction, conversion of germylated monofluoroalkenes, and modification of complex organic molecules.
A novel approach for the synthesis of monofluoroalkenes through photocatalyzed decarboxylative/deboronative coupling has been established, utilizing α-fluoroacrylic acids and alkyl trifluoroborates. This methodology provides an efficient strategy to forge C (sp)–C (sp) bonds, enabling the transformation of alkyl boron compounds into valuable monofluoroalkenes. The method demonstrates broad substrate
利用α-氟丙烯酸和三氟硼酸烷基酯,建立了一种通过光催化脱羧/脱硼偶联合成单氟烯烃的新方法。该方法提供了一种有效的策略来形成 C (sp)–C (sp) 键,从而能够将烷基硼化合物转化为有价值的单氟烯烃。该方法显示出广泛的底物范围,接受各种α-氟丙烯酸,并在温和条件下产生具有出色选择性的备受追捧的单氟烯烃产品。
Copper-Catalyzed Carboxylation of C–F Bonds with CO<sub>2</sub>
An effective Cu-catalyzed selective formal carboxylation of C-F bonds with an atmospheric pressure of CO2 is reported. A variety of gem-difluoroalkenes, gem-difluorodienes, and alpha-trifluoro-methyl alkenes show high reactivity and selectivity for this ipso monocarboxylation. Under mild conditions, diverse important alpha-fluoroacrylic acids and alpha,alpha-difluorocarboxylates are obtained in good-to-high yields. Moreover, this operationally simple protocol features good functional group tolerance, is readily scalable, and the resulting products are readily converted into bioactive alpha-fluorinated carbonyl compounds, indicating potential application in biochemistry and drug discovery. Mechanistic studies reveal that fluorinated boronate esters might be vital intermediates in this transformation.