Hydrochloric Acid → Methyl 4-methoxybenzimidate hydrochloride
Reaktionsgleichung
[CH3:1][O:2][C:3]1[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][CH:4]=1.[ClH:11].[CH3:12][OH:13]>>[ClH:11].[CH3:1][O:2][C:3]1[CH:10]=[CH:9][C:6]([C:7](=[NH:8])[O:13][CH3:12])=[CH:5][CH:4]=1Komponenten
4
Versuchsvorschrift
4-methoxybenzonitrile (12.5 g, 91.1 mmol) was dissolved in methanol (140 mL), through this cooled (−5° C.) solution gaseous HCl was bubbled for about 3 hours. The reaction mixture was then stirred, in a closed flask, at r.t. for 24 hours. Then the excess HCl was stripped by bubbling nitrogen and the resulting solution was concentrated, the residue was taken up with TBME (100 mL) and stirred for 30 min., then filtrated and dried to provide the title product as a colourless powder 19.0 g (quantitative). C9H11NO2.HCl, MW: 201.69 1H-NMR (300 MHz, D2O) ppm: 4.20 (s, 3H), 6.9 (m, 1H); 7.65 (m, 1H); 8.40 (m, 1H).