An iodine-catalyzed denitrative imino-diaza-Nazarov cyclization (DIDAN) methodology has been developed for the synthesis of pyrazoles with high to excellent yields by using α-nitroacetophenone derivatives and in situ generated hydrazones. The key transformation of this oxidative 4π-electrocyclization proceeds through an enamine–iminium ion intermediate. This rapid one-pot DIDAN protocol results in
Diacylfurazan oxides are prepared by catalytic dimerization of alpha-nitroketones.
Diacylfurazan氧化物是通过α-硝基酮的催化二聚化制备的。
Unexpected C-C bond cleavage of<font>α</font>-nitroketone in the presence of TsNBr<sub>2</sub>: A new pathway for C-N bond formation
作者:Manas Jyoti Sarma、Prodeep Phukan
DOI:10.1080/00397911.2015.1135348
日期:2016.2
A new catalyst-free protocol for C-N bond formation via the cleavage of -nitroketone has been developed. When -nitroketones are treated with TsNBr2 in the presence of potassium carbonate, unexpected cleavage of C(O)-CHNO2 bond of -nitroketone was observed followed by the formation of corresponding amide. Various nitroketones could be converted to corresponding amide using this procedure.
Sarma, Manas Jyoti; Phukan, Prodeep, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2018, p. 523 - 533
作者:Sarma, Manas Jyoti、Phukan, Prodeep
DOI:——
日期:——
Three-Component Synthesis of Indolizines from Azaaromatic-Acetylenedicarboxylate Zwitterions with Acylzirconocene Chloride Complexes
Acylzirconocene chloride complexes worked well as a reaction partner of azaaromatic-acetylenedicarboxylate zwitterions derived from isoquinolines or pyridines with diethyl acetylenedicarboxylate to afford the corresponding indolizine derivatives.