Sodium hydride → HCID 15003986, Verbindung

Beteiligte Stoffe

Reaktionsschritte

Under ice-cooling condition, to 25 ml of DMF solution containing 5.70 g of Z-Tyr-OCH3 was added 692 mg of sodium hydride (containing 60%) and the mixture was stirred for 30 minutes, then 3.96 g of benzyl bromoacetate was added thereto and the whole mixture was stirred at 50° C. for 1 hour. The reaction mixture was concentrated under reduced pressure and the residue thus obtained was extracted with 100 ml of ethyl acetate. The ethyl acetate layer was washed with water and a saturated sodium chloride aqueous solution twice, respectively, then dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue thus obtained was added to a silica gel column and eluted with petroleum ether-chloroform (1:4) to obtain 6.00 g (yield: 72.6%) of the above-mentioned objective product.

Herkunft & Nachweise