3-Chlorophenol → 7-[1-(3-Chlorophenoxy)ethyl]-[1,2,4]triazolo[1,5-a]pyrimidine

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Reaction Steps

A solution of 3-chlorophenol (1.28 g) in dry 1,2-dimethoxyethane was added slowly to a stirred suspension of sodium hydride (0.48 g) in dry 1,2-dimethoxyethane (35 ml). The mixture was stirred for 30 minutes, then a solution of 7-(1-bromoethyl)-1,2,4-triazolo[1,5-a]pyrimidine (2.27 g, prepared in a similar manner to that described in Example 6) in dry 1,2-dimethoxyethane (85 ml) was added dropwise. The reaction mixture was stirred overnight at room temperature, filtered and the solvent was evaporated from the filtrate under reduced pressure. The residue was purified by flash chromatography using as eluent a mixture of ethyl acetate and petroleum ether to give 7-[1-(3-chlorophenoxy)ethyl]-1,2,4-triazolo[1,5-a]pyrimidine. Yield 2.11 g, (mp 124°-126° C.).

Provenance & Evidence