Triethylamine → 4-Isocyanato-2-methylquinoline

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-methyl-quinoline-4-carboxylic acid (276 mg, 1.2 mmol) in DMF (4 mL) at 0° C. is added triethylamine (1.22 mg, 1.2 mmol) and slowly (30 min) DPPA (332 mg, 1.2 mmol). The reaction mixture is stirred for 2 h at 0° C. and 12 h at 20° C. The reaction is quenched with ice (10 g) and extracted with Et2O (6×30 mL). The combined organic extracts are washed successively with saturated NaHCO3 (2×15 mL) and water (2×10 mL), and are evaporated without heating in vacuo. The residue is dissolved in dry toluene and heated at reflux for 2 h. The resulting solution is carried forward without further isolation of the title compound.

Provenance & Evidence