A facile and regioselective synthesis of polysubstituted pyrroles from α-azido chalcones and 1,3-dicarbonylcompounds is described. Indium trichloride in water is found to be efficient in catalyzing this transformation.
Diastereo- and Enantioselective Organocatalytic Direct Conjugate Addition of γ-Butenolide to Chalcones
作者:Yinan Zhang、Chenguang Yu、Yafei Ji、Wei Wang
DOI:10.1002/asia.201000014
日期:——
A diastereo‐ and enantioselectiveconjugateaddition reaction of γ‐butenolide with chalcones has been developed. Notably, unmodified γ‐butenolide was directly employed as a nucleophile in the Michael addition reactions. This process was catalyzed by a previously reported cyclohexane diamine thiourea under mild reaction conditions to afford enantioenriched synthetically and biologically important substituted
Sondu, S.; Sethuram, B; Rao, T. Navaneeth, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1990, vol. 29, # 1, p. 67 - 69
作者:Sondu, S.、Sethuram, B、Rao, T. Navaneeth
DOI:——
日期:——
Synthesis, antitubercular activity, and QSAR analysis of substituted nitroaryl analogs: chalcone, pyrazole, isoxazole, and pyrimidines
作者:Revathi A. Gupta、Satish G. Kaskhedikar
DOI:10.1007/s00044-012-0385-3
日期:2013.8
corresponding chalcones. These corresponding chalcones were reacted with hydrazine hydrate, urea, thiourea, and hydroxylamine hydrochloride, which led to the formation of corresponding novel pyrazole, pyrimidine, and isooxazole derivatives, respectively. All newly synthesized compounds were evaluated for their antimycobacterial activities against Mycobacterium tuberculosis using agar dilution. The results
Copper Powder-Catalyzed Regio- and Stereoselective Aminobromination of α,β-Unsaturated Ketones with TsNH<sub>2</sub> and NBS as Nitrogen and Halogen Sources
The regio- and stereoselective aminobromination of α,β-unsaturated ketones catalyzed by copper powder has been established with 4-TsNH2 and NBS as the nitrogen/bromine sources, respectively. This method provides an easy access for preparation of vicinal aminohalo derivatives in the presence of 1 mol % catalyst. Electron-rich α,β-unsaturated ketones afforded the corresponding aminobrominated products