Amine-catalyzed synthesis of N2-sulfonyl 1,2,3-triazole in water and the tunable N2-H 1,2,3-triazole synthesis in DMSO via metal-free enamine annulation
作者:Yanhui Guo、Yunyun Liu、Jie-Ping Wan
DOI:10.1016/j.cclet.2021.08.003
日期:2022.2
N2-H 1,2,3-triazoles via organocatalytic annulation of enaminone/enaminoester with sulfonylazide has been realized. The unconventional selectivity providing N2-sulfoyl 1,2,3-triazoles takes place in pure water, wherein the hydrogen bond effect between water and the intermediate resulting from enamine-azide corporation accounts for the novel reaction selectivity. On the other hand, the reactions conducted
作者:Yulia A. Zobenko、Stefania A. Pozhidaeva、Anna K. Kuratova、Larisa V. Glyzdinskaya、Marina A. Vorontsova、Galina P. Sagitullina
DOI:10.1007/s10593-017-2164-z
日期:2017.9
Rearrangement of quaternary 6-aryl-2-methyl-3(5)-nitropyridinium salts was used for the synthesis of unsymmetrical nitrobiaryls. The starting nitropyridines were obtained by a three-component one-pot synthesis, two-step Hantzsch synthesis using nitro ketones, and by cyclocondensation of acylpyruvates with enamines derived from nitroacetone and nitroacetophenones.
Synthesis of Enaminone‐Pd(II) Complexes and Their Application in Catalysing Aqueous Suzuki‐Miyaura Cross Coupling Reaction
作者:Leiqing Fu、Xiaoji Cao、Jie‐Ping Wan、Yunyun Liu
DOI:10.1002/cjoc.201900417
日期:2020.3
series of Pd(II)‐enaminone complexes, termed Pd(eao)2, have been synthesized and characterized. The investigation on the catalytic activities of these new Pd(II)‐reagents has proved that the Pd(eao)2‐1 possesses excellent catalytic activity for the Suzuki‐ Miyaura cross couplingreactions of aryl bromides/chlorides with aryl/vinyl boronic acids in the environmentally benign media of aqueous PEG400 at
Domino C-H Sulfonylation and Pyrazole Annulation for Fully Substituted Pyrazole Synthesis in Water Using Hydrophilic Enaminones
作者:Yanhui Guo、Guodong Wang、Li Wei、Jie-Ping Wan
DOI:10.1021/acs.joc.8b02897
日期:2019.3.1
NH2-functionalized enaminones and sulfonyl hydrazines have been developed for the synthesis of fully substituted pyrazoles. By making use of the hydrophilic primary amino group in the enaminones, the reactions proceed well in the medium of pure water in the presence of molecular iodine, TBHP, and NaHCO3 via cascade C-H sulfonylation and pyrazole annulation. The cleavage of the C–N bond in enaminones is confirmed
Solid-State Synthesis of β-Enamino
Ketones from Solid 1,3-Dicarbonyl Compounds and Ammonium
Salts or Amines
作者:Jing-Hua Li、Shi-Liang Xu、Cheng-Ping Li
DOI:10.1055/s-0028-1087914
日期:——
A facile amination of solid 1,3-dicarbonyl compounds with ammonium salts or amines in solid state has been achieved by mechanochemical grinding in the presence of KHSO4 and SiO2. Most of the reactions proceed smoothly at room temperature under solid-state conditions and give their corresponding β-imino derivatives in high yields. The method has the advantage of simple manipulation and mild conditions.