Hypoglycemic 5-furyl and 5-thienyl derivatives of oxazolidine-2,4-dione and the pharmaceutically-acceptable salts thereof; certain 3-acylated derivatives thereof; and intermediates useful in the preparation of said compounds.
Palladium-catalyzed formylation of organic halides with carbon monoxide and tin hydride
作者:Victor P. Baillargeon、J. K. Stille
DOI:10.1021/ja00263a015
日期:1986.2
La formylation catalysee par le palladium d'une variete de substrats organiques (iodoarenes, halogenures benzyliques, iodures vinyliques, triflates de vinyles et halogenures allyliques) avec le tributylstannane et le monoxyde de carbone donne les aldehydes avec de bons rendements dans des conditions douces et tolere un certain nombre de groupes fonctionnels
La formylation catalysee par le palladium d'une variete de substrats Organics特定的团体名称
Microwave-assisted, Mo(CO)6-mediated, palladium-catalyzed amino-carbonylation of aryl halides using allylamine: from exploration to scale-up
作者:Prasad Appukkuttan、Linda Axelsson、Erik Van der Eycken、Mats Larhed
DOI:10.1016/j.tetlet.2008.07.053
日期:2008.9
Palladium-catalyzed aminocarbonylations of various (hetero)aryl halides with allylamine usingMo(CO)6 as a solid, in situ CO source, were explored. Microwave-enhanced conditions proved to be highly useful in promoting the conversions in a mere 10–20 min with various (hetero)aryliodides, bromides and chlorides. The scale-up of a microwave-enhanced aminocarbonylation to 25 mmol scale was performed successfully
Rhodium-Catalyzed Formylation of Aryl Halides with CO<sub>2</sub> and H<sub>2</sub>
作者:Zhenghui Liu、Zhenzhen Yang、Bo Yu、Xiaoxiao Yu、Hongye Zhang、Yanfei Zhao、Peng Yang、Zhimin Liu
DOI:10.1021/acs.orglett.8b02027
日期:2018.9.7
The reductive formylation of aryl iodides/bromides to aryl aldehydes using CO2/H2 is presented for the first time. It was realized over a catalytic system composed of RhI3 or RhI3/Pd(dppp)Cl2 (dppp = 1,3-bis(diphenyphosphino)propane) and PPh3 in the presence of Ac2O/Et3N at 100 °C, affording aromatic aldehydes in good to excellent yields, together with good functional-group tolerance and broad substrate
首次提出了使用CO 2 / H 2将芳基碘化物/溴化物还原为甲酰醛的方法。它是在100°C的Ac 2 O / Et 3 N存在下,由RhI 3或RhI 3 / Pd(dppp)Cl 2(dppp = 1,3-双(二苯膦基)丙烷)和PPh 3组成的催化体系实现的。°C,可提供高至优异收率的芳族醛,以及良好的官能团耐受性和广泛的底物范围。该反应通过三个级联步骤进行,包括HCOOH的形成,CO的释放和芳基卤化物的甲酰化。
Three-component vicinal-diarylation of alkenes <i>via</i> direct transmetalation of arylboronic acids
作者:Yun Zhang、Gong Chen、Dongbing Zhao
DOI:10.1039/c9sc02182e
日期:——
Herein, we report three-component vicinal-diarylation of non-conjugated alkenes initiated by transmetalation of arylboronic acids, which provides complementary access to β,γ-diaryl carbonyl compounds. We have also screened a large number of chiral ligands for developing an enantioselective version of this reaction and obtained the preliminary results (up to 79 : 21 e.r.). Notably, the methodology developed