Diethyl Ether → 1-(Isoquinolin-1-yl)ethan-1-one
Reaktionsgleichung
[C:1]1(C#N)[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][N:2]=1.C[Mg]Br.CC[O:18][CH2:19][CH3:20]>C1COCC1>[C:1]1([C:19](=[O:18])[CH3:20])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][N:2]=1Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
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%).