76439-40-2

Basic information

• Product Name: 1-ethyl-3,5-diphenyl-1H-pyrazole
• Synonyms: 1-ethyl-3,5-diphenyl-1H-pyrazole
• CAS NO: 76439-40-2
• Molecular Weight: 248.327
• Mol File: 76439-40-2.mol

Chemical Properties

• CAS DataBase Reference: 1-ethyl-3,5-diphenyl-1H-pyrazole(CAS DataBase Reference)
• NIST Chemistry Reference: 1-ethyl-3,5-diphenyl-1H-pyrazole(76439-40-2)
• EPA Substance Registry System: 1-ethyl-3,5-diphenyl-1H-pyrazole(76439-40-2)

Safety Data

• Hazardous Substances Data: 76439-40-2(Hazardous Substances Data)

Upstream product

• 450360-76-6 C₁₅H₁₆N₂ 
• 1456630-31-1 N¹-ethyl-4-methyl-N'¹-(phenylmethylene)-1-benzenesulfonohydrazide 
• 536-74-3 phenylacetylene 
• 100-52-7 benzaldehyde 
• 555-96-4 Benzylhydrazine 
• 98-86-2 acetophenone 
• 25229-59-8 Benzalacetophenon-p-tosylhydrazid 
• 94-41-7 benzalacetophenone 
• 1145-01-3 3,5-Diphenylpyrazole 
• 75-03-6 ethyl iodide 
• 43222-48-6 1,2-dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulphate 
• 19311-79-6 1-methyl-3,5-diphenyl-1H-pyrazole 
• 43222-53-3 1-ethyl-2-methyl-3,5-diphenylpyrazolium ethyl sulfate 
• 110-89-4 piperidine 

Relevant articles and documents

Preparation method for pyrazole

The invention relates to a preparation method for pyrazole, belonging to the field of organic chemistry. The preparation method disclosed in the invention realizes preparation of pyrazole through a cyclization reaction of N-alkylated phenylsulfonylhydrazone with terminal alkyne. The reaction has good function group tolerance and high yield and is applicable to a wide range of substrates.

Aluminum Chloride Mediated Reactions of N-Alkylated Tosylhydrazones and Terminal Alkynes: A Regioselective Approach to 1,3,5-Trisubstituted Pyrazoles

Aluminum chloride mediated reactions of N-alkylated tosylhydrazones and terminal alkynes are reported. The protocol is applied to a wide range of substrates, and demonstrates excellent functional group tolerance. A series of 1,3,5-trisubstituted pyrazoles is prepared in good to high yields with complete regioselectivity.

Regioselective synthesis of 1,3,5-Trisubstituted Pyrazoles from N-Alkylated Tosylhydrazones and terminal Alkynes

An efficient synthesis of 1,3,5-trisubstituted pyrazoles from Nalkylated tosylhydrazones and terminal alkynes was developed. The protocol was applied to a wide range of substrates and demonstrated excellent tolerance to a variety of substituents, includin

Copper-Catalyzed aerobic intramolecular dehydrogenative cyclization of n,n-disubstituted hydrazones through C sp 3 -H functionalization

An aerobic activity: The title reaction proceeds through an oxidation/cyclization/aromatization sequence under an atmosphere of O 2 (see scheme; DBU=1,8-diazabicyclo[5.4.0]undec-7-ene, DCE=1,2-dichloroethane, DMS=dimethylsulfide). This coupling

Efficient one-pot synthesis of substituted pyrazoles

An efficient, one-pot synthesis of substituted pyrazoles from enones, hydrazides, and halides was developed. In comparison with the classical Knorr pyrazole synthesis, this methodology gave a different type of product (R 3≥R5). A range of substituted pyrazoles were prepared in good to high yields with complete regioselectivity.