Cobalt‐Catalyzed Aerobic Oxidative Cleavage of Alkyl Aldehydes: Synthesis of Ketones, Esters, Amides, and α‐Ketoamides
作者:Tingting Li、Gerald B. Hammond、Bo Xu
DOI:10.1002/chem.202101035
日期:2021.7.7
developed to synthesize ketones, esters, amides via the oxidative C−C bond cleavage of readily available alkyl aldehydes. Green and abundant molecular oxygen (O2) was used as the oxidant, and base metals (cobalt and copper) were used as the catalysts. This strategy can be extended to the one-pot synthesis of ketones fromprimary alcohols and α-ketoamides fromaldehydes.
Palladium-Catalyzed Synthesis of 1,2-Diketones from Aryl Halides and Organoaluminum Reagents Using <i>tert</i>-Butyl Isocyanide as the CO Source
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b04414
日期:2020.1.17
In this work, an interesting and practical procedure for the synthesis of 1,2-diketonesfrom aryl halides and organoaluminum reagents has been developed. Employing tert-butyl isocyanide as the CO source and palladium as the catalyst, the desired 1,2-diketones were isolated in good to excellent yields with good functional group tolerance. Concerning the reaction partners, besides aryl halides, both
Substituted Aromatic Carboxamide and Urea Derivatives as Vanilloid Receptor Ligands
申请人:FRANK Robert
公开号:US20110003795A1
公开(公告)日:2011-01-06
The invention relates to substituted aromatic carboxamide and urea derivatives, to processes for the preparation thereof, to pharmaceutical compositions containing these compounds and also to the use of these compounds for preparing pharmaceutical compositions.
Stereodivergent asymmetric hydrogenation of quinoxalines
作者:Chenguang Liu、Xufang Liu、Qiang Liu
DOI:10.1016/j.chempr.2023.05.006
日期:2023.9
products, preferably using a catalytic method, is of great interest and importance in both organic synthesis and drug discovery. Herein, we report an unprecedented stereodivergent AH of di-substituted quinoxalines via Mn catalysis, furnishing cis- and rarely accessed trans-chiral tetrahydroquinoxalines (THQs) with high levels of diastereo- and enantioselectivity. This transformation features excellent functional
An efficient heterogeneous palladium-catalyzed carbonylative coupling of arylhalides and organoaluminum compounds has been developed using tert-butyl isocyanide as CO equivalent. The carbonylation reaction proceeds smoothly in toluene with KOtBu as a base at 100 °C by using 10 mol% of an SBA-15-anchored bidentate phosphine palladium(0) complex [2P-SBA-15-Pd(0)] as the catalyst and provides a general
使用叔丁基异氰化物作为CO当量,开发了芳基卤化物和有机铝化合物的高效非均相钯催化羰基化偶联。使用 10 mol% 的 SBA-15 锚定二齿膦钯 (0) 络合物 [2P-SBA-15-],以 KO t Bu 为碱,在甲苯中于 100 °C 下,羰基化反应顺利进行。 Pd(0)]作为催化剂,为1,2-二酮的组装提供了一种通用且实用的方法,且收率良好。这种多相钯催化剂可以通过简单的离心过程轻松分离和回收,并可重复使用七个以上循环,且催化效率几乎一致。