Réaction #1605750

Équation de réaction

benzo[1,3]dioxole-5-carbonyl chloride

heptan-4-amine

triethylamine

→

N-(heptan-4-yl)benzo[d][1,3]dioxole-5-carboxamide

Rendement 48.5%

Solvants

dichloromethane

dichloromethane

Conditions de réaction

Traitement

1. 1
   AutreSolvent was removed under reduced pressure
2. 2
   workup.DISSOLUTIONthe residue was dissolved in EtOAc
3. 3
   LavageThe organic layer was washed successively with 1 N aq. HCl, 1 N aq. NaOH, water, brine
4. 4
   Séchagedried (MgSO4)
5. 5
   Concentrationconcentrated
6. 6
   AutreThe residue was recrystallized in EtOAc

Mode opératoire

To a solution of heptan-4-amine (8.06 mL, 54 mmol) in triethylamine (15.3 mL, 108 mmol) and dichloromethane (135 mL), was added, dropwise at 0° C., a solution of benzo[1,3]dioxole-5-carbonyl chloride (10 g, 54 mmol) dissolved in dichloromethane (135 mL). The reaction mixture was stirred for 1 h. Solvent was removed under reduced pressure and the residue was dissolved in EtOAc. The organic layer was washed successively with 1 N aq. HCl, 1 N aq. NaOH, water, brine, dried (MgSO4) and concentrated. The residue was recrystallized in EtOAc and Hexanes to afford 6.9 g of N-(heptan-4-yl)benzo[d][1,3]dioxole-5-carboxamide (48.3%) as a white solid. 1H NMR (500 MHz, CDCl3): δ 0.92 (t, 6H), 1.38 (m, 6H), 1.53 (m, 2H), 4.11 (m, 1H), 5.63 (m, 1H), 6.01 (s, 2H), 7.98 (d, 1H), 7.27 (s, d, 2H). MS (M+H, 264).

Source