Réaction #2340

Équation de réaction

3-vinylbutyrolactone

sodium acetate

methanol

→

methyl 4-hydroxy-3-vinylbutyrate

Conditions de réaction

Traitement

1. 1
   AutreSolvent was evaporated
2. 2
   Autrethe residue was partitioned between water and ether
3. 3
   ExtractionThe aqueous layer was extracted twice more with ether
4. 4
   Filtrationfiltered through phase
5. 5
   Autreseparating paper
6. 6
   Autreevaporated
7. 7
   FiltrationThe residue was purified by filtration chromatography on silica gel (Merck 7736)

Mode opératoire

A solution of RS 3-vinylbutyrolactone (3.5 g) and sodium acetate (2.56 g) in methanol (30 ml) was kept for 20 hours. Solvent was evaporated and the residue was partitioned between water and ether. The aqueous layer was extracted twice more with ether and the extracts combined, filtered through phase separating paper and evaporated. The residue was purified by filtration chromatography on silica gel (Merck 7736) starting with 1/9 ethyl acetate/hexane and progressing to 4/6 ethyl acetate/hexane as eluent to give methyl 4-hydroxy-3-vinylbutyrate as an oil; NMR(CDCl3) δ 5.73(1H,m), 5.15(2H,m), 3.68(3H,s), 3.60(2H,t), 2.76(1H,m), 2.48(2H,m), 1.69(1H,t); m/e 145(M+H)+.

Source