method for the synthesis of pyrazoles through a copper-catalyzed condensation reaction has been developed. The new catalytic system not only maintained a broad substrate scope but was also active under acid-free reaction conditions, overcoming the conventional requirement for an acid-catalyzed system. Furthermore, the copper catalyst enabled this reaction to be performed at roomtemperature and in a short
[Ce(<scp>l</scp>-Pro)<sub>2</sub>]<sub>2</sub> (Oxa) as a heterogeneous recyclable catalyst: synthesis of pyrazoles under mild reaction conditions
作者:Ramesh Katla、Rakhi Chowrasia、Padma S. Manjari、Caren D. G. da Silva、Beatriz F. dos Santos、Nelson L. C. Domingues
DOI:10.1039/c6nj01723a
日期:——
A highly efficient method for the synthesis of pyrazoles mediated by [Ce(l-Pro)2]2 (Oxa) as a heterogeneous catalyst.
一种由[Ce(l-Pro)2]2 (Oxa)作为非均相催化剂介导的吡唑合成的高效方法。
Iodine-mediated synthesis of 4-selanylpyrazoles
作者:Junxing Wang、Yuhong Liu、Jie Yan
DOI:10.1039/c8nj02629g
日期:——
A new and simple procedure mediated by I2 is developed for the preparation of 4-selanylpyrazoles from pyrazoles and diselenides.
通过I2介导的一种新的简单程序,用于从吡唑和二硒化物制备4-硒代吡唑。
Oxaziridine-Mediated Amination of Primary Amines: Scope and Application to a One-Pot Pyrazole Synthesis
作者:Alan Armstrong、Lyn H. Jones、Jamie D. Knight、Richard D. Kelsey
DOI:10.1021/ol0474507
日期:2005.2.1
Electrophilic amination of primary aliphatic and aromatic amines is reported using a diethylketomalonate-derived oxaziridine to afford the corresponding N-Boc hydrazines in good to excellent yields. The method allows a one-pot synthesis of pyrazoles from primary amines. [Reaction: see text]