Reaktion #4510

Reaktionsgleichung

hydrochloric acid

acetyl chloride

ethyl (E)-6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-thiohexenoate

pyridine

→

ethyl (E)-6-(1,3-dihydro-4-acetoxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-thiohexenoate

Lösungsmittel

acetonitrile

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with ethyl acetate
2. 2
   TrocknenThe organic solution was dried over anhydrous magnesium sulfate
3. 3
   Sonstigeevaporated to an oil, which
4. 4
   Sonstigewas triturated with ether

Vorschrift

To a solution of 1.6 g of ethyl (E)-6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-thiohexenoate in 120 ml of acetonitrile at 0° C. was added 0.74 ml of pyridine followed by 1.0 ml of acetyl chloride. After stirring for 2 hours the reaction mixture was poured into dilute hydrochloric acid and extracted with ethyl acetate. The organic solution was dried over anhydrous magnesium sulfate and evaporated to an oil, which was triturated with ether to give ethyl (E)-6-(1,3-dihydro-4-acetoxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-thiohexenoate, m.p. 81°-84° C.

Quelle