255840-57-4

Basic information

• Product Name: Benzene, 1-ethynyl-2-(1,2-propadienyl)- (9CI)
• Synonyms: Benzene, 1-ethynyl-2-(1,2-propadienyl)- (9CI)
• CAS NO: 255840-57-4
• Molecular Formula: C₁₁H₈
• Molecular Weight: 140.18122
• Mol File: 255840-57-4.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• CAS DataBase Reference: Benzene, 1-ethynyl-2-(1,2-propadienyl)- (9CI)(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1-ethynyl-2-(1,2-propadienyl)- (9CI)(255840-57-4)
• EPA Substance Registry System: Benzene, 1-ethynyl-2-(1,2-propadienyl)- (9CI)(255840-57-4)

Safety Data

• Hazardous Substances Data: 255840-57-4(Hazardous Substances Data)

Upstream product

• 177481-88-8 1-(2-((trimethylsilyl)ethynyl)phenyl)prop-2-yn-1-ol 
• 77123-58-1 2-[2-(trimethylsilyl)ethynyl]benzaldehyde 
• 26260-02-6 2-iodobenzaldehyde 
• 255840-56-3 1-(2-ethynylphenyl)prop-2-yn-1-ol 

Downstream Products

• 1485-07-0 naphthalen-2-ethanol 
• 42101-92-8 2-naphthylmethyl methyl ether 
• 91-57-6 2-Methylnaphthalene 

Relevant articles and documents

Parallel mechanisms for the cycloaromatization of enyne allenes

The Myers-Saito cycloaromatization of enyne allenes is proposed to consist of two parallel mechanisms, one involving a biradical and the other with dipolar character. MCSCF calculations suggest that a nonplanar cyclic allene could be fairly close in enthalpy to the biradical, while the planar zwitterion originally proposed as a possible second intermediate is in fact a transition state for the interconversion of the two enantiomeric cyclic allenes. Competitive trapping experiments rule out the presence of a single intermediate and are consistent with the participation of parallel pathways. The reaction of (Z)-hepta-1,2,4-trien-6-yne in cyclopentadiene gave an inseparable mixture of two tetracyclic products whose structures were elucidated with 2-D NMR.