Direct Carbo-Acylation Reactions of 2-Arylpyridines with α-Diketones via Pd-Catalyzed C–H Activation and Selective C(sp2)–C(sp2) Cleavage
摘要:
An efficient carbo-acylation reaction of 2-arylpyridines with alpha-diketones via Pd-catalyzed C-H bond activation and C-C bond cleavage in the presence of TBHP was developed that generated aryl ketones in good yields. The highly selective formation of aryl ketones was observed when 2-arylpyridines reacted with aromatic/aliphatic alpha-diketones.
Decarboxylative acylation of arenes with mandelic acid derivatives via palladium-catalyzed oxidative sp<sup>2</sup> C–H activation
作者:Xia Liu、Ze Yi、Jianhui Wang、Guiyan Liu
DOI:10.1039/c4ra14107e
日期:——
An efficient palladium catalyzed decarboxylative acylation of arenes with mandelic acid derivatives via oxidative sp2 C–H activation in the presence of tert-butyl hydroperoxide has been developed. The acylation reaction is assisted by a pyridine directing group. The starting materials are inexpensive and readily available. This method provides an economical and convenient way to synthesize aryl ketones
Decarboxylative Acylation of Arenes with α-Oxocarboxylic Acids via Palladium-Catalyzed C−H Activation
作者:Mingzong Li、Haibo Ge
DOI:10.1021/ol1012857
日期:2010.8.6
An efficient palladium-catalyzeddecarboxylative acylation of unactivated arenes with α-oxocarboxylic acids is reported. This method provides a novel access to aryl ketones.
报道了未活化的芳烃与α-氧代羧酸的有效的钯催化的脱羧酰化。该方法为芳基酮提供了一种新颖的途径。
Palladium-catalyzed ortho-acylation of 2-aryl pyridine derivatives using arylmethyl amines as new acyl sources
作者:Qian Zhang、Fan Yang、Yangjie Wu
DOI:10.1039/c3cc42106f
日期:——
A facile and efficient protocol for palladium-catalyzed ortho-acylation of 2-aryl pyridines was developed. Note that this acylation utilized arylmethyl amines as new, cheap and readily available acylation reagents and exhibited high regioselectivity for 2-aryl pyridines bearing a meta-substituent in the aryl ring moiety.
Extrusion of CO from Aryl Ketones: Rhodium(I)-Catalyzed CC Bond Cleavage Directed by a Pyridine Group
作者:Zhi-Quan Lei、Hu Li、Yang Li、Xi-Sha Zhang、Kang Chen、Xin Wang、Jian Sun、Zhang-Jie Shi
DOI:10.1002/anie.201107136
日期:2012.3.12
The rhodium(I)‐catalyzed extrusion of carbon monoxide from biaryl ketones and alkyl/alkenyl arylketones was developed to produce biaryls and alkyl/alkenyl arenes, respectively, in high yields (see scheme). A wide range of functionalities are tolerated. Not only does this method provide an alternative pathway to construct useful scaffolds, but also offers a new strategy for CCbond activation.
Palladium(II)-Catalyzed C–H Acylation with Arylglycine Derivatives
作者:Bainian Feng、Weizheng Fan、Jiapeng Su
DOI:10.1055/s-0034-1380440
日期:——
A novel palladium(II)-catalyzed ortho acylation of arenes with arylglycines in the presence of Cu(OAc)(2) and K2S2O8 to afford the benzophenones was developed. This direct C-H acylation is suitable for a broad range of substrates. The control experiments suggested a possible oxidative addition mechanism.