Thionyl Chloride → o-Iodophenylacetyl chloride
Reaction equation
[I:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]([OH:11])=O.S(Cl)([Cl:14])=O>>[I:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]([Cl:14])=[O:11]Participants
Procedure
A solution of 13.32 g (0.05 mol) of 2-iodophenylacetic acid in 75 ml thionyl chloride is refluxed for 2 hours, and the volatiles removed under vacuum. Toluene is added (3 times) and the solvent removed under vacuum after each addition to give 2-iodophenylacetyl chloride as a gum. To the preceding compound (0.05 mol) in a mixture of 100 ml of toluene-dichloromethane (1:1) is added 11 g (0.05 mol) of 2-iodoaniline and (0.10 mol) of diisopropylethylamine. The mixture is stirred at room temperature overnight and the solvent removed. The residue is dissolved in dichloromethane and the solution washed with 1N HCl, saturated sodium bicarbonate, brine and dried (Na2SO4). The solvent is removed and the residue recrystallized from methanol-ether to give 16.0 g of light brown crystals, m.p. 160°-163° C.
Workup
- customthe volatiles removed under vacuum
- additionToluene is added (3 times)
- customthe solvent removed under vacuum
- additionafter each addition
Sources & evidence
- ORD record
- ord-77f8518ca034457a94ed7c2620ee8504
- Source dataset
- uspto-grants-1997_11
- Patent number
- US05686445
Reaction notes
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