2-Bromopropane → HCID 22145815, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 5-hydroxy-6-methylthionicotinoate (3 g), isopropyl bromide (2.1 mL) and anhydrous potassium carbonate (3 g) in dry dimethylformamide (35 mL) is stirred and heated at 60±5° C. for 18 hours. After cooling the solvent is removed in vacuo and the residue partitioned between ethyl acetate and water. The organic phase is washed with brine and dried (MgSO4). Evaporation gives a brown oil which is purified by flash chromatography (pentane/ethyl acetate 4:1 v/v as eluent on silica) to give methyl 5-isopropyloxy-6-methylthionicotinoate (2.36 g) as a pale yellow oil. [Elemental analysis: C, 54.40; H, 6.24; N, 5.88%. calculated: C, 54.75; H, 6.27; N, 5.81%.].

Provenance & Evidence