Direct allylation of aromatic and α,β-unsaturated carboxamides under ruthenium catalysis
作者:Mirim Kim、Satyasheel Sharma、Neeraj Kumar Mishra、Sangil Han、Jihye Park、Minyoung Kim、Youngmi Shin、Jong Hwan Kwak、Sang Hoon Han、In Su Kim
DOI:10.1039/c4cc03354j
日期:——
The ruthenium-catalyzed oxidative allylation of aromatic and alpha,beta-unsaturated carboxamides with allylic carbonates is described. These transformations proceed readily with complete linear gamma-selectivity of substituted allylic carbonates.
cyclopentadienyl (Cp)-Rh(III) complex, bearing ester and pendant amide moieties on the Cpring [CpARh(III)], is able to catalyze the aerobic oxidative olefination of benzamides, bearing nonspecial carbamoyl groups, with styrenes including disubstituted ones at relatively low temperature (60–80 °C). The presence of both the ester and pendant acidic N-phenylcarbamoyl moieties on the CpA ligand play important
已经确定,新开发的中等电子缺陷的环戊二烯基(Cp)-Rh(III)配合物在Cp环[Cp A Rh(III)]上带有酯和侧基酰胺部分,能够催化好氧氧化烯化反应带有非特殊氨基甲酰基基团的苯甲酰胺,在相对较低的温度(60–80°C)下含苯乙烯,包括二取代的苯甲酰胺。Cp A配体上的酯和酸性N-苯基氨基甲酰基侧基的存在在促进催化的过程中起着重要作用,同时又不影响配合物的热稳定性。
Rh(<scp>iii</scp>)-catalyzed C–H activation/cyclization of benzamides and diazo compounds to form isocoumarins and α-pyrones
作者:Xing Guang Li、Min Sun、Kai Liu、Qiao Jin、Pei Nian Liu
DOI:10.1039/c4cc09314c
日期:——
Rhodium-catalyzed intermolecular cyclization of benzamides and diazo compounds via C–H activation has been achieved to construct C–C/C–O bonds for the first time.
Rh(III)-Catalyzed Coupling of Benzamides with Propargyl Alcohols via Hydroarylation–Lactonization
作者:Fen Wang、Zisong Qi、Jiaqiong Sun、Xuelin Zhang、Xingwei Li
DOI:10.1021/ol403166p
日期:2013.12.20
Rh(III)-catalyzed C-H activation and annulation of 1-benzoylpyrrolidine with propargyl alcohols has been achieved for an efficient synthesis of (4-benzylidene)isochroman-1-one. Highly enantioenriched products were obtained starting from optically pure propargyl alcohols.
Direct Prenylation of Aromatic and α,β-Unsaturated Carboxamides via Iridium-Catalyzed C−H Oxidative Addition−Allene Insertion
作者:Yong Jian Zhang、Eduardas Skucas、Michael J. Krische
DOI:10.1021/ol901759t
日期:2009.9.17
Exposure of aromatic carboxamides 1e-1m, heteroaromatic carboxamides in-1p, and alpha,beta-unsaturated carboxamides 1q-1s to 1,1-dimethylallene in the presence of the a cationic iridium complex derived from [Ir(cod)(2)]BAr4F and rac-BINAP results in direct C-H prenylation to furnish adducts 2e-2m, 2n-2p, and 2q-2s, respectively, in good isolated yields as single isomers.