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
Palladium catalyzed direct ortho C–H acylation of 2-arylpyridines using toluene derivatives as acylation reagents
作者:Zhipeng Xu、Biao Xiang、Peipei Sun
DOI:10.1039/c2ra22208f
日期:——
A facile ortho-acylation of 2-arylpyridines by a Pd-catalyzed oxidative CâH activation was developed, in which no prefunctionalized toluene derivatives were used as acylation reagents in a tandem reaction to form 2-pyridyldiaryl ketones with moderate yields.
Nickel-catalyzed regioselective C–H acylation of chelating arenes: a new catalytic system for C–C bond formation <i>via</i> a radical process and its mechanistic explorations
作者:Ze-lin Li、Peng-yu Wu、Kang-kang Sun、Chun Cai
DOI:10.1039/c9nj02191d
日期:——
ortho C–Hbond of chelating arenes via the Ni(II)-catalyzed cross dehydrogenative coupling strategy has been developed here. This new procedure exhibits excellent regioselectivity and good functional group tolerance. This discovery could be of great importance for the C–H acylation reactions of chelating arenes without any extraneous directing group and for the application of nickel-catalyzed C–H activation
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.