Selective synthesis of 1-indanones via tandem knoevenagel condensation-cycloalkylation of β-dicarbonyl compounds and aldehydes
摘要:
Aromatic 1,3-dicarbonyl compounds react with not enolizable aldehydes in the presence of C2H5MgBr or AlCl3 affording 2-carbethoxy- and 2-acetyl-1-indanones via tandem Knoevenagel condensation-cycloalkylation process.
Gold/copper-catalyzed activation of the aci-form of nitromethane in the synthesis of methylene-bridged bis-1,3-dicarbonyl compounds
作者:Rengarajan Balamurugan、Seetharaman Manojveer
DOI:10.1039/c1cc14926a
日期:——
Activation of the aci-form of nitromethane using Lewis acids for the attack of carbon nucleophiles was studied. 1,3-Dicarbonyl compounds in the presence of catalytic amounts of AuCl3 or Cu(OTf)2 in nitromethane solvent could be converted into methylene-bridged bis-1,3-dicarbonyl compounds.
Aerobic Oxidation of a Tertiary Aliphatic Amine Under Visible-Light Photocatalysis: Facile Synthesis of Methylene-Bridged Bis-1,3-dicarbonyl Compounds
作者:Woo-Jin Yoo、Arata Tanoue、Shū Kobayashi
DOI:10.1002/asia.201200807
日期:2012.12
Lights, camera, action! An efficient protocol for the formation of methylene‐bridged bis‐1,3‐dicarbonyl compounds has been developed through an aerobic photocatalytic oxidative coupling reaction between 1,3‐dicarbonyl compounds and a tertiary aliphaticamine.
Metal-free synthesis of methylene-bridged bis-1,3-dicarbonyl compounds via oxidative C–C bond cleavage of tertiary aliphatic amines
作者:Li-Juan Xing、Xi-Mei Wang、Hong-Ying Li、Wen Zhou、Ning Kang、Peng Wang、Bin Wang
DOI:10.1039/c4ra04419c
日期:——
A metal-free Bu4NI mediated oxidative reaction utilizing tertiaryaliphaticamines and 1,3-dicarbonyl compounds for the synthesis of methylene-bridgedbis-1,3-dicarbonyl compounds has been developed. This reaction involved an unexpected C–C bond cleavage of tertiaryaliphaticamines. With this approach, the completely regioselective functionalization of β-carbon on tertiaryamines was realized.
Iron-Catalyzed Selective Oxidation of <i>N</i>-Methyl Amines: Highly Efficient Synthesis of Methylene-Bridged bis-1,3-Dicarbonyl Compounds
作者:Haijun Li、Zhiheng He、Xingwei Guo、Wenjuan Li、Xuhui Zhao、Zhiping Li
DOI:10.1021/ol901751c
日期:2009.9.17
Methylene-bridged bis-1,3-dicarbonyl derivatives were synthesized efficiently by iron-catalyzed oxidative reactions of 1,3-dicarbonylcompounds and N,N-dimethylaniline. Bipyrazoles and substituted 1,4-dihydropyridine were obtained by the reactions of bis-1,3-dicarbonyl compounds with hydrazines and ammonium acetate, respectively.
Water mediated trapping of active methylene intermediates generated by IBX-induced oxidation of Baylis–Hillman adducts with nucleophiles
作者:Jia-Neng Tan、Haoquan Li、Yanlong Gu
DOI:10.1039/c0gc00274g
日期:——
Baylis–Hillman adduct with IBX. The generated product, a methyleneintermediate, could be trapped in situ by many nucleophiles in water, such as styrenes, β-dicarbonyl compounds, benzamide and less reactive indoles. This strategy offers an alternative way to methylenylation of β-dicarbonyl compounds with formaldehyde for the formation of a methyleneintermediate, thus allows the use of some nucleophiles that