Hydrochloric Acid → 3-Methylisoquinoline-4-carbaldehyde

Participants

Reaction Steps

To a solution of n-BuLi (2.5M, 0.869 ml, 2.17 mmol)) in 10 ml anhydrous THF at −50° C., 4-bromo-3-methylisoquinoline (0.460 g, 2.07 mmol) was added. After 10 minutes of stirring, DMF (0.32 g, 4.14 mmol) was added to the solution. The reaction mixture was allowed to stir at −50° C. for 20 minutes and then at room temperature for 15 minutes. 5 ml of 1N HCl was added and the solution was stirred for another 5 minutes. The reaction mixture was neutralized with saturated solution of NaHCO3 (25 ml) and partitioned between ethylacetate (2×20 ml) and water (10 ml). The organic layer was dried over sodium sulfate, filtered, concentrated and column purified (hexane:EtOAc; 3:2) to give 0.151 g (43%) of the product as a syrup.

Provenance & Evidence