Propylamine → Propyl pentanesulfonamide

Temperature

0 °C

Pentane sulfonyl chloride (687 mg, 4.03 mmol) was dissolved in 5 mL CH2Cl2 and added to an ice-cooled solution of n-propylamine (0.40 mL, 4.82 mmol) and ethyldiisopropylamine (0.85 mL, 4.88 mmol) in 5 mL CH2Cl2 under a nitrogen atmosphere. The reaction was stirred at 0° C. for 30 min, then at 25° C. for 4 h. The solution was partitioned between 20 mL of 1.0 M aqeous NaHSO4 and 25 mL CH2Cl2. The organic phase was washed sequentially with 25 mL H2O and 25 mL brine, then dried (Na2SO4), filtered, and concentrated in vacuo to provide 739 mg (3.83 mmol, 95%) of the title compound as a white solid. TLC (25% EtOAc-hexane) Rf 0.23; 1H NMR (CDCl3, 300 MHz) δ 0.92 (t, J=7 Hz, 3H), 0.97 (t, J=7 Hz, 3H), 1.28-1.50 (br m, 4H), 1.52-1.68 (m, 2H), 1.75-1.90 (br m, 2H), 2.98-3.06 (m, 2H), 3.08 (q, J=6 Hz, 2H), 4.10-4.23 (br m, 1H); MS (DCl/NH3) m/e 211 (M+NH4)+.

1. waitat 25° C. for 4 h
2. customThe solution was partitioned between 20 mL of 1.0 M aqeous NaHSO4 and 25 mL CH2Cl2
3. washThe organic phase was washed sequentially with 25 mL H2O and 25 mL brine
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo

ORD record

ord-cf9863b4a8914db0a40475345a7c47d4

Source dataset

uspto-grants-2002_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06462194B1