Réaction #835839

Équation de réaction

ether

isoquinoline-1-carbonitrile

methylmagnesium bromide

→

1-isoquinolin-1-yl-ethanone

Rendement 75.0%

Solvants

THF

Conditions de réaction

Traitement

1. 1
   AutreThe mixture was quenched with a sat. solution of NH4Cl
2. 2
   Extractionextracted with ethyl acetate
3. 3
   SéchageThe organic layers were dried over MgSO4
4. 4
   Filtrationfiltered
5. 5
   Concentrationconcentrated under reduced pressure
6. 6
   AutreThe material was purified by chromatography on silica gel with 10% ethyl acetate

Mode opératoire

A solution of isoquinoline-1-carbonitrile (Intemediate H1) (commercially available from Aldrich) (4.40 g, 28.5 mmol) in THF at 0° C. was treated with methylmagnesium bromide (20 mL, of a 3M soln in ether) for 3 h. (see procedure found in Vacher, B. et al J. Med. Chem. 1998 41, 5070; incorporated herein by reference). The mixture was quenched with a sat. solution of NH4Cl and stirred for 3 h at rt. The aqueous layer was basified with NaOH and extracted with ethyl acetate. The organic layers were dried over MgSO4, filtered and concentrated under reduced pressure. The material was purified by chromatography on silica gel with 10% ethyl acetate: hexane to give 1-isoquinolin-1-yl-ethanone (Intermediate H2) 3.65 g (75%).

Source