Propionic Acid → (+/-)9-[6-(4-Methoxy-benzylamino)-pyridin-2-yl]-3-quinoxalin-2-yl-non-4-enoic acid ethyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of the allylic alcohol 22-3 (0.26 g, 0.57 mmol) in (EtO)3CMe (10 mL) was treated with 100 μL of a 1 mL solution of (EtO)3CMe containing 10 μL of propionic acid. The yellow solution was heated at 150° C. for 90 minutes. The solution was cooled to room temperature and poured into 1N HCl/brine. The mixture was extracted with CHCl3, dried, concentrated, and purified on silica gel (90:5:5 CHCl3:EtOAc:MeOH) to give 0.143 g (48%) of 22-4.

Herkunft & Nachweise