3236-44-0

Basic information

• Product Name: 3,4-Dihydro-2-vinyl-2H-pyran
• Synonyms: 3,4-Dihydro-2-vinyl-2H-pyran
• CAS NO: 3236-44-0
• Molecular Formula: C₇H₁₀O
• Molecular Weight: 110.15
• Mol File: 3236-44-0.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 97 °C(Press: 20 Torr)
• Appearance: /
• Density: 0.986±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 3,4-Dihydro-2-vinyl-2H-pyran(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-Dihydro-2-vinyl-2H-pyran(3236-44-0)
• EPA Substance Registry System: 3,4-Dihydro-2-vinyl-2H-pyran(3236-44-0)

Safety Data

• Hazardous Substances Data: 3236-44-0(Hazardous Substances Data)

Upstream product

• 100-73-2 acrolein dimer 
• 1779-49-3 Methyltriphenylphosphonium bromide 

Downstream Products

• 33741-15-0 methyl (4E)-hepta-4,6-dienoate 
• 72581-32-9 cyclohex-3-enylmethanol 
• 17264-01-6 4-(1-hydroxyethyl)-1-cyclohexene 
• 100-50-5 3-Cyclohexene-1-carboxaldehyde 

Relevant articles and documents

ALIPHATIC CLAISEN REARRANGEMENT PROMOTED BY ORGANOALUMINIUM REAGENTS.

Organoaluminium compounds, R//3Al, promote the Claisen rearrangement of allyl vinyl ether derivatives at room temperature under transfer of R or H as a nucleophile to the aldehydic carbon. Treatment of 1-butyl-2-propenyl vinyl ether with a hexane solution of Me//3Al (1. 0 M, 2. 2 equiv) in CH//2ClCH//2Cl at 25 degree C afforded 5-decen-2-ol (91% yield, E/Z equals 47/53), which was produced by the left bracket 3,3 right bracket sigmatropic rearrangement and successive methylation. The rearrangements with alkynylation, alkenylation, and hydrogenation are also achieved. The regular Claisen rearrangement products, of gamma , delta -unsaturated aldehydes (ketones), are obtained at 25 degree C in good to excellent yields with Et//2AlSPh (2. 5 equiv) or the combination of Et//2AlCl (2. 0 euiv) and PPh//3 (2. 2 equiv).