25113-26-2Relevant academic research and scientific papers
Regioselective [3 + 2]-annulation of hydrazonyl chlorides with 1,3-dicarbonyl compounds for assembling of polysubstituted pyrazoles
Liu, Kun,Shang, Xinye,Cheng, Yuyu,Chang, Xiaoyong,Li, Pengfei,Li, Wenjun
, p. 7811 - 7814 (2018)
A facile approach to polysubstituted pyrazoles from hydrazonyl chlorides and 1,3-dicarbonyl compounds has been developed. In the presence of DMAP combined with Et3N, hydrazonyl chlorides reacted with N-phenyl-3-oxobutanamides smoothly to afford
Synthesis method of polysubstituted pyrazole compound
-
Paragraph 0025; 0095-0097, (2018/09/08)
The invention discloses a synthesis method of a polysubstituted pyrazole compound. Compounds shown as formulas in the description are used as reaction raw materials and react under the action of a Lewis base to generate a compound shown as the formula in
A new approach for the synthesis of pyrazoles via 1,3-dipolar cycloaddition of nitrile imines to acetyl acetone
Umesha,Lokanatha Rai,Ajay Kumar
, p. 1450 - 1453 (2007/10/03)
The acetyl acetone 3 reacts smoothly with the nitrile imines 2 generated in situ by the catalytic dehydrogenation of diphenyl hydrazones 1 using chloramine-T to afford regioselective cycloadducts 5,6 in 59-78% and 6-8% yields respectively.
