Ethanol → Ethyl 3-iodo-2-methylbenzoate
Reaktionsgleichung
[I:1][C:2]1[C:3]([CH3:11])=[C:4]([CH:8]=[CH:9][CH:10]=1)[C:5]([OH:7])=[O:6].S(Cl)(Cl)=O.[CH2:16](O)[CH3:17]>>[CH2:16]([O:6][C:5](=[O:7])[C:4]1[CH:8]=[CH:9][CH:10]=[C:2]([I:1])[C:3]=1[CH3:11])[CH3:17]Komponenten
4
Versuchsvorschrift
To a stirred solution of 3-iodo-2-methyl-benzoic acid (30 g, 0.11 mol) in ethanol (425 mL) was added thionyl chloride (42 mL, 0.57 mol) at 0° C. The mixture was refluxed for 4.5 h before it was cooled to room temperature and concentrated in vacuo. The residue was partitioned between ethyl ether and saturated sodium bicarbonate solution. The organic layer was washed with brine, dried over anhydrous sodium sulfate and was concentrated in vacuo to give the title compound as a pale yellow oil (32.28 g): 1H NMR (CDCl3, 200 MHz): δ=7.94 (d, J=7.8 Hz, 1H), 7.70 (d, J=7.4 Hz, 1H), 6.90 (t, J=7.8 Hz, 1H), 4.35 (q, J=7.2 Hz, 2H), 2.65 (s, 3H), 1.38 (t, J=7.0 Hz, 3H).