An improved preparation of 3-bromo-2H-pyran-2-one: an ambiphilic diene for Diels-Alder cycloadditions
CAS index name: 2H-Pyran-2-one, 3-bromo-
Organic SynthesesCycloaddition

A checked procedure from Organic Syntheses, the journal whose preparations are repeated in a second laboratory before publication. The full experimental, with amounts, hazards and characterisation data, is on orgsyn.org.
Reagents
The compound this preparation makes is not in the catalogue, so no reagents or figures are listed here.
Named reactions in this procedure
More cycloaddition reactions
- 7α-Acetoxy-(1Hβ, 6Hβ)-bicyclo[4.4.1]undeca-2,4,8-triene via chromium-mediated higher order cycloaddition
- Copper(I)-catalyzed photocycloaddition: 3,3-dimethyl-cis-bicyclo[3.2.0]heptan-2-one
- Cu-catalyzed azide-alkyne cycloaddition: preparation of tris((1-benzyl-1H-1,2,3-triazolyl)methyl)amine
- [4+3] Cycloaddition in water. Synthesis of 2,4-endo,endo-dimethyl-8-oxabicyclo[3.2.1]oct-6-en-3-one
- [4+2] Cycloaddition of 1-dimethylamino-3-tert-butyldimethylsiloxy-1,3-butadiene with methyl acrylate: 4-hydroxymethyl-2-cyclohexen-1-one
- [4 + 3] Cycloaddition of aminoallyl cations with 1,3-dienes: 11-oxatricyclo[4.3.1.12,5]undec-3-en-10-one