2-Amino-3-methylpyridine → HCID 178470327, compound

Participants

Reaction Steps

A solution of ethyl 5-(2-bromoacetyl)-2-hydroxy-4-thiazolecarboxylate (2.94 g) and 2-amino-3-methylpyridine (3.24 g) in 1,2-dimethoxyethane (100 ml) was refluxed for 1.5 hours. The reaction mixture was evaporated in vacuo. To the residue was added a mixture of ethyl acetate and water, and the resulting mixture was acidified to pH 0.8 with 10% hydrochloric acid. The separated aqueous layer was adjusted to pH 7.5 with 20% potassium carbonate and extracted with ethyl acetate. The extract was washed with brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was triturated with diethyl ether and recrystallized from a mixture of ethyl acetate and tetrahydrofuran to give 2-(4-ethoxycarbonyl-2-hydroxy-5-thiazolyl)-8-methylimidazo[1,2-a]pyridine (1.76 g). mp 240°-242° C. (dec.).

Provenance & Evidence