Potassium Carbonate → 3-{4-[2-(4-tert-butoxycarbonylaminophenyl)ethoxy]phenyl}-(S)-2-ethoxypropanoic acid ethyl ester

Participants

Reaction Steps

2-[4-(tert-Butoxycarbonylamino)phenyl]ethylmethanesulfonate (described in Example40a) (52.9 g; 0.168 mmole), (S)-2-ethoxy-3-(4-hydroxyphenyl)propanoic acid ethyl ester (described in Example 40h) (40 g; 0.168 mmole) and potassium carbonate (69.5 g; 0.503 mmole) were mixed in acetonitrile (1200 ml) and refluxed over night. Another portion of 2-[4-(tert-butoxycarbonylamino)phenyl]ethylmethanesulfonate (2.5 g; 7.9 mmole) was added. The reaction mixture was refluxed for 8 more hours then filtered. Evaporation of the filtrate gave 76.6 g 3-{4-[2-(4-tert-butoxycarbonylaminophenyl)ethoxy]phenyl}-(S)-2-ethoxypropanoic acid ethyl ester.

Provenance & Evidence