Hydrochloric Acid → Valeranilide

To a solution of 2-n-propylaniline (8.91 g, 66 mmol) and Et3N (14 mL, 106 mmol) in CH2Cl2 (60 mL) was added acetic anhydride (10.9 mL, 99 mmol) dropwise. The resulting mixture was allowed to stir at room temp. overnight, then was treated with a 1N HCl solution (40 mL). The acidic mixture was extracted with CH2Cl2 (2×30 mL). The combined organic layers were sequentially washed with H2O (40 mL), a 1N NaOH solution (40 mL), H2O (40 mL) and a saturated NaCl solution (40 mL), dried (Na2SO4), and concentrated under reduced pressure. The resulting powder was purified by crystalization (EtOAc) to give 2-n-propylacetanilide as white needles (7.85 g, 67%). TLC (30% EtOAc/hex) Rf0.37.

1. extractionThe acidic mixture was extracted with CH2Cl2 (2×30 mL)
2. washThe combined organic layers were sequentially washed with H2O (40 mL)
3. dry with materiala 1N NaOH solution (40 mL), H2O (40 mL) and a saturated NaCl solution (40 mL), dried (Na2SO4)
4. concentrationconcentrated under reduced pressure
5. customThe resulting powder was purified by crystalization (EtOAc)

ORD-Eintrag

ord-33cdbdd5b0e24d02959954a90fb89064

Quelldatensatz

uspto-grants-2002_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06353006B1