Réaction #216747

Équation de réaction

hydrochloric acid

sodium hydride

3-indolecarboxylic acid

1-iodobutane

→

1-butylindole-3-carboxylic acid

Rendement 86.1%

Solvants

—

ice water

DMF

DMF

DMF

Conditions de réaction

Traitement

1. 1
   workup.STIRRINGThe mixture was stirred for 30 minutes
2. 2
   workup.STIRRINGThe mixture was stirred for approximately 12 hours
3. 3
   Extractionextracted 3 times with ethyl acetate
4. 4
   Lavagewashed twice with water
5. 5
   Séchagedried over magnesium sulfate
6. 6
   ConcentrationThe mixture was concentrated
7. 7
   workup.ADDITIONthe residue mixed with diethylether
8. 8
   FiltrationFiltration

Mode opératoire

A suspension of sodium hydride (34.1 g, 1.42 mol) in 300 mL of DMF was stirred in an ice/methanol bath and a solution of 3-indolecarboxylic acid (55.0 g, 0,374 mol) in 250 mL DMF was added dropwise over 45 minutes. The mixture was stirred for 30 minutes and then 100 mL of additional DMF was added. The mixture was cooled to 0° C. and 1-iodobutane (8.79 g, 40.8 mL, 0.359 mol) was added. The mixture was stirred for approximately 12 hours. The mixture was then poured in 2.0 L of ice water, acidified with 1N hydrochloric acid, extracted 3 times with ethyl acetate, washed twice with water and then dried over magnesium sulfate. The mixture was concentrated and the residue mixed with diethylether. Filtration gave 1-butylindole-3-carboxylic acid (62.74 g, 0.309 mol) as a white powder.

Source