Pd(II)-Catalyzed C–H Iodination Using Molecular I2 as the Sole Oxidant
摘要:
Pd-catalyzed ortho-C-H iodination directed by a weakly coordinating amide auxiliary using h as the sole oxidant was developed. This reaction is compatible with a wide range of heterocycles including pyridines, imidazoles, oxazoles, thiazoles, isoxazoles, and pyrazoles.
Ligand-Enabled Meta-C–H Alkylation and Arylation Using a Modified Norbornene
摘要:
2-Carbomethoxynorbornene is identified as a more effective transient mediator to promote a Pd(II)-catalyzed meta-C(sp(2))-H alkylation of amides with various alkyl iodides as well as arylation with previously incompatible aryl iodides. The use of a tailor-made quinoline ligand is also crucial for this reaction to proceed.
The palladium-catalyzed alkynylation of phenylacetic acid derivatives using 4-CF3C6F4NH2 as the auxiliary is described. The reaction efficiency can be greatly promoted by pyridine ligand, which enables the reaction to proceed at a catalystloading as low as 1 mol%. Various functional groups are tolerated under the reaction conditions. The kinetic studies show that the rate of the reaction is first
描述了使用4-CF 3 C 6 F 4 NH 2作为辅助剂的钯催化的苯乙酸衍生物的炔基化反应。吡啶配体可以大大提高反应效率,这使得反应可以在低至1 mol%的催化剂负载下进行。在反应条件下容许各种官能团。动力学研究表明,在苯乙酰胺中,反应速率为一级反应,吡啶配体的组合中的Pd(OAc)2提供了高度耐用且有效的催化剂。