Heptane → 3-{4-[2-(4-Tert-butylcarbamoyloxyphenyl)ethoxy]phenyl}-2-ethoxypropanoic acid ethyl ester

Participants

Reaction Steps

tert-Butyl isocyanate (0.14 g; 1.4 mmole) was slowly added to a solution of 2-ethoxy-3-{4-[2-(4-hydroxyphenyl)ethoxy]phenyl}propanoic acid ethyl ester (described in Example 26b) (0.5 g; 1.4 mmole) in toluene (5 ml) and thereafter the reaction mixture was stirred over night. The crude mixture was purified by chromatography on silica gel using ethyl acetate:heptane (gradient 1.25-80% ethyl acetate) as eluant to give 0.13 g (yield 20%) of 3-{4-[2-(4-tert-butylcarbamoyloxyphenyl)ethoxy]phenyl}-2-ethoxypropanoic acid ethyl ester.

Provenance & Evidence