Hydrochloric Acid → 2,6-Dichloro-4'-hydroxy-5'-nitro-2'-methyl-benzophenone

HRID 965465Notes

Reaction equation

[Cl-].[Al+3].[Cl-].[Cl-].[Cl:5][C:6]1[CH:25]=[CH:24][CH:23]=[C:22]([Cl:26])[C:7]=1[C:8]([C:10]1[CH:15]=[C:14]([N+:16]([O-:18])=[O:17])[C:13]([O:19]C)=[CH:12][C:11]=1[CH3:21])=[O:9].Cl.O>C(Cl)Cl>[Cl:5][C:6]1[CH:25]=[CH:24][CH:23]=[C:22]([Cl:26])[C:7]=1[C:8]([C:10]1[CH:15]=[C:14]([N+:16]([O-:18])=[O:17])[C:13]([OH:19])=[CH:12][C:11]=1[CH3:21])=[O:9]

Participants

Conditions

Temperature: 45 °C

Procedure

Aluminumchloride (1.5 g; 11 mmol) is added to a solution of 2,6-dichloro-5'-nitro-4'-methoxy-2'-methyl-benzophenone (1.8 g; 5.3 mmol) in methylenechloride (6 ml). The mixture is stirred for 30 minutes at 20° C. and for 1 hour at 45° C., 5 ml conc. hydrochloric acid/ice are added. After shaking with 20 ml of methylenechloride the organic layer is treated with 2N hydrochloric acid and with water. After drying the solvent is evaporated, the residue purified by chromatography (flash column filled with 30 g of silicagel, elution with toluene). The residue from the main fraction is treated with diisopropylether to give yellow crystalls; (1.2 g; 73% y); mp. 170° C.

Workup

customAfter drying the solvent
customis evaporated
customthe residue purified by chromatography (flash column filled with 30 g of silicagel, elution with toluene)
additionThe residue from the main fraction is treated with diisopropylether
customto give yellow crystalls

Sources & evidence

ORD record: ord-262858d7cf5046a39be6143a69e90622
Source dataset: uspto-grants-1998_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05773663

Reaction notes

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