128641-83-8

Upstream product

• 15645-75-7 1,1’-[(Z)-ethene-1,2-diyldisulfonyl]bis(4-methylbenzene) 
• 2684-60-8 2-diazopropane 
• 128641-81-6 3,3-dimethyl-4-(p-tolylsulfonyl)-3H-pyrazole 
• 107696-97-9 3,3-dimethyl-4-(p-tolylsulfonyl)-5-(trimethylsilyl)-3H-pyrazole 
• 128641-87-2 1-acetyl-4-chloro-5,5-dimethyl-4-(p-tolylsulfonyl)-2-pyrrazoline 

Downstream Products

• 137305-81-8 cis-1-<<2,2-dimethyl-3-(1-methylethyl)-3-(phenylthio)cyclopropyl>sulfonyl>-4-methylbenzene 
• 137305-81-8 trans-1-<<2,2-dimethyl-3-(1-methylethyl)-3-(phenylthio)cyclopropyl>sulfonyl>-4-methylbenzene 
• 137305-79-4 3,3-dimethyl-2-(isopropyl)-1-(p-tolylsulfonyl)cyclopropane 
• 128641-84-9 3,3-dimethyl-5-isopropoyl-4-(p-tolylsulfonyl)-3H-pyrazole 

Relevant academic research and scientific papers

PREPARATION AND REACTIVITY OF ARYLSULFONYL SUBSTITUTED CYCLOPROPENES

A study of the cycloaddition behaviuor of several arylsulfonyl substituted alkynes with 2-diazopropane has been carried out.These activated acetylenes react to give 3H-pyrazoles which extrude nitrogen on photolysis to produce cyclopropenes in high yield.Soft nucleophiles such as thiophenoxide readily add to the activated pi-bond to give thiophenyl substituted cyclopropanes.Reaction of 1-phenylsulfonyl-2,3,3-trimethylcyclopropene with n-butyllithium followed by alkylation with various electrophiles produces arylsulfonyl substituted methylene cyclopropanes.These compounds undergo thermal rearrangement to the thermodynamically more stable isopropylidene cyclopropane.

Dipolar cycloaddition reaction of diazoalkanes with trimethylsilyl substituted alkynes. Steric control of regiochemistry by the trimethylsilyl group

A study of the cycloaddition behavior of several trimethylsilyl substituted alkynes with 2-diazopropane and diazomethane has been carried out. Aryl or alkyl ethynyl sulfones react to give 5-sulfonyl substituted 3H-pyrazoles which extrude nitrogen on photo