34667-97-5

Basic information

• Product Name: 3-Cyclobutene-1,2-dione, 3-methyl-4-phenyl-
• CAS NO: 34667-97-5
• Molecular Formula: C11H8O2
• Molecular Weight: 172.183
• Mol File: 34667-97-5.mol
• Article Data: 10

Chemical Properties

• CAS DataBase Reference: 3-Cyclobutene-1,2-dione, 3-methyl-4-phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 3-Cyclobutene-1,2-dione, 3-methyl-4-phenyl-(34667-97-5)
• EPA Substance Registry System: 3-Cyclobutene-1,2-dione, 3-methyl-4-phenyl-(34667-97-5)

Safety Data

• Hazardous Substances Data: 34667-97-5(Hazardous Substances Data)

Upstream product

• 178418-78-5 4,4-diethoxy-2-methyl-3-phenyl-2-cyclobutenone 
• 14630-40-1 Bis(trimethylsilyl)ethyne 
• 917-54-4 methyllithium 
• 591-51-5 phenyllithium 
• 5222-73-1 3,4-dimethoxy-3-cyclobutene-1,2-dione 
• 673-32-5 1-Phenylprop-1-yne 
• 15321-51-4 diiron nonacarbonyl 
• 13463-40-6 iron pentacarbonyl 
• 52577-23-8 7,7-Dichloro-6,6-difluoro-1-phenyl-2,3-diaza-bicyclo[3.2.0]hept-2-ene 
• 36048-48-3 1-<2-Diethoxy-vinyl>-2-phenyl-cyclobutendion-(3.4) 
• 22315-46-4 bromo-phenyl-cyclobutenedione 
• 129034-74-8 3-(tri-n-butylstannyl)-4-(1-methylethoxy)cyclobut-3-ene-1,2-dione 2-(ethylene acetal) 
• 29769-75-3 3-Hydroxy-4-methyl-3-cyclobutene-1,2-dione 
• 591-50-4 iodobenzene 

Downstream Products

• 81399-72-6 3--4-phenyl-3-cyclobuten-1,2-dion 
• 36394-24-8 4-Hydroxy-5-phenyl-4-cyclopenten-1,2,3-trion-hydrat 
• 81287-12-9 4,5-Dihydroxy-2-phenyl-4-cyclopenten-1,3-dion 
• 81287-14-1 3,4-Dioxo-2-phenyl-1-cyclobuten-1-carboxamid 
• 81399-76-0 3-Phenyl-4-(2-phenylethyl)-3-cyclobuten-1,2-dion 
• 81287-15-2 3-<(Acetoxyimino)methyl>-4-phenyl-3-cyclobuten-1,2-dion 
• 81399-79-3 3-<2-(2-Chlorphenyl)ethyl>-4-phenyl-3-cyclobuten-1,2-dion 
• 81399-78-2 3-<2-(4-Methoxyphenyl)ethyl>-4-phenyl-3-cyclobuten-1,2-dion 
• 81399-77-1 3-Phenyl-4-<2-(2,4,6-trimethylphenyl)ethyl>-3-cyclobuten-1,2-dion 
• 81399-98-6 (Z)-3-(3-Hydroxy-4-oxo-2-phenyl-2-cyclobuten-1-ylidenmethyl)-4-phenyl-3-cyclobuten-1,2-dion 
• 81399-80-6 4-<2-(3,4-Dioxo-2-phenyl-1-cyclobuten-1-yl)ethyl>benzoesaeuremethylester 
• 58283-01-5 3,4-Dioxo-2-phenyl-1-cyclobuten-1-carbonitril 
• 1357195-49-3 C₂₁H₁₈O₂ 
• 1357195-48-2 C₂₀H₁₆O₂ 

Relevant articles and documents

Formation of 2-[1-(Trimethylsilyl)alkylidene]-4-cyclopentene-1,3-dione from Lewis Acid-Catalyzed Reaction of Cyclobutenedione Monoacetal with Alkynylsilane: Novel Cationic 1,2-Silyl Migrative Ring Opening and Subsequent 5-Exo-Trig Ring Closure

An ethoxycarbenium ion intermediate, which was produced by the catalytic action of a Lewis acid on a cyclobutenedione monoacetal, reacted with phenyl(trimethylsilyl)acetylene to give a normal electrophilic substitution product. In sharp contrast, the same

Organoytterbium ate complexes extend the value of cyclobutenediones as isoprene equivalents

Changing course: While organolithium and Grignard reagents favor addition to C1 of A (R=Me), the corresponding organoytterbium reagents add to C2 (R=tBu). Computational studies provide insights into the nature of organoytterbium species and their reactivity, and a total synthesis of (-)-mansonone B illustrates the utility of the method in terpenoid synthesis. Tf=trifluoromethanesulfonyl.

A simple and convenient method for the synthesis of cyclobutenediones from alkynes using new Fe(CO)5/NaH/MeI reagent system

Iron carbonyl complexes prepared in situ using the Fe(CO)5/NaH/MeI reagent combination and alkynes at 25 °C give the corresponding cyclobutenediones in 50-65% yields after CuCl2 · 2H2O oxidation.