Methyl Ethyl Ketone → 4-[4-[2-(1,3-Dioxolan-2-yl)ethyl]phenoxyacetyl]-5-methyl-2-phenyloxazole

Beteiligte Stoffe

Reaktionsschritte

A mixture of 4-bromoacetyl-5-methyl-2-phenyloxazole (2.60 g), 4-[2-(1,3-dioxolan-2-yl)ethyl]phenol (1.82 g), potassium carbonate (1.28 g) and 2-butanone (60 ml) was stirred for 20 hours at temperatures ranging from 70 to 80° C. The reaction mixture was poured into water. Resulting crystalline precipitate was collected by filtration, which was purified by means of a silica gel column chromatography. From the fractions eluted with chloroform-methanol (100:1, v/v), 4-[4-[2-(1,3-dioxolan-2-yl)ethyl]phenoxyacetyl]-5-methyl-2-phenyloxazole (2.08 g, 57%) was obtained. Recrystallization from dichloromethane-isopropyl ether gave colorless prisms, m.p.119-120° C.

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