56426-36-9

Upstream product

• 94274-69-8 tert-Butylammonium-<3,4-bis(methoxycarbonyl)-5-phenyl-1-pyrazolido>-methyl-phosphat 
• 67-63-0 isopropyl alcohol 
• 65756-81-2 (Z)-2-benzylidenesuccinic acid 
• 65756-82-3 Z-methyl 4-(phenyl)-3-methoxycarbonylbut-3-enoate 
• 100-52-7 benzaldehyde 
• 100423-11-8 α-(trimethylsilyl)benzylamine 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 75-65-0 tert-butyl alcohol 
• 74-89-5 methylamine 
• 75-64-9 tert-butylamine 
• 124-40-3 dimethyl amine 
• 85078-69-9 1,2-dimethoxycarbonylpyrazolo<1,5-b><1,2>benzoisothiazole 
• 141-43-5 ethanolamine 
• 64-17-5 ethanol 

Relevant academic research and scientific papers

Generation and cycloaddition of polymer-supported azomethine imines: Traceless synthesis of pyrazole derivatives from α-silylnitrosoamide derivatives bound to resin

1,3-Dipolar cycloaddition of polymer-supported azomethine imines with dimethyl acetylenedicarboxylate (DMAD) gave pyrazole derivatives in good yields. The azomethine imines were generated from polymer-supported α- silylnitrosoamides by a 1,4-silatropic shift. The feature of this reaction is that no cleavage operations are required after the cycloaddition. (C) 2000 Elsevier Science Ltd.

Intramolecular Cyclization of Vinyldiazoacetates as a Versatile Route to Substituted Pyrazoles

Vinyldiazo compounds undergo a thermal electrocyclization to form pyrazoles in yields of up to 95percent. The reactions are operationally simple, use readily available starting materials, require no intervention of a catalyst, and enable the synthesis of mono-, di- A nd tri-substituted pyrazoles. With the ability to produce highly substituted pyrazoles and the flexibility in installing various types of substituents, this method constitutes a new entry to this valuable heterocyclic scaffold and may be of interest to all branches of the chemical industry.

Trisubstituted pyrazole derivative and preparation method thereof

The main purpose of the present invention is to provide a completely-new trisubstituted pyrazole derivative and a preparation method thereof. According to the present invention, with the method, the trisubstituted pyrazole derivative can be simply and eff

Azolides, 7. - Phosphonate and Phosphate Group Transfer with Pyrazolides

The tert-butylammonium α-diazophosphinates 7 add onto acceptor-substituted acetylenes 8 with formation of N-phosphorylpyrazoles: Primarily formed 3H-pyrazoles 9 undergo spontaneous sigmatropic shift of the anionic PO-group to yield 10. α-Diazophosph