Iodine → 4-Iodo-2-n-propylaniline

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 2-n-propylaniline in MeOH (25 mL) was added a solution of NaHCO3 (5.0 g, 59.5 mmol) in H2O (25 mL). Iodine (8.4 g, 33.3 mmol) was added portionwise over 70 min. while maintaining the temp. at 10° C., then the mixture was allowed to stir at 10° C. for 30 min. The resulting mixture was diluted with H2O (30 mL) and extracted with EtOAc (4×40 mL). The combined organic layers were sequentially washed with a 5% Na2S2O3 solution (30 mL) and a saturated NaHCO3 solution (30 mL), dried (Na2SO4), and concentrated under reduced pressure to give 4-iodo-2-n-propylaniline (9.4 g, 98%): TLC (20% EtOAc/hex) Rf0.43. This material was used in the next step without further purification.

Herkunft & Nachweise