P-Chloroacetophenone → 4-Chloro-γ,ε-dioxobenzenehexanoic acid

HRID 1934855Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:10])[CH3:9])=[CH:4][CH:3]=1.[C:11]1(=[O:17])[O:16][C:14](=[O:15])[CH2:13][CH2:12]1>>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:10])[CH2:9][C:11](=[O:17])[CH2:12][CH2:13][C:14]([OH:16])=[O:15])=[CH:4][CH:3]=1

Participants

Reactant 2

HCID 7467P-Chloroacetophenone

HCID 7922Succinic anhydride

Product 1

HCID 109012054-Chloro-γ,ε-dioxobenzenehexanoic acid

Procedure

U.S. Pat. No. 5,117,054 describes a process wherein p-chloroacetophenone is reacted with succinic anhydride to form 4-chloro-γ,ε-dioxo-benzenehexanoic acid which is reacted with acetic anhydride or acetyl chloride to yield 5-[2-(4-chlorophenyl)-2-oxoethylidene]dihydro-2(3H)-furanone. This compound is then added to a mixture of N-methylhydroxylamine hydrochloride and an amine base such as triethylamine, Hunig's base, pyridine or lutidine and a solvent such as methylene chloride or chloroform to form 4-chloro-N-hydroxy-N-methyl-γ,ε-dioxo-benzenehexanamide which is combined with 4-methoxyphenyl hydrazine hydrochloride, an amine base as described above in an alcoholic solvent such as methanol, ethanol or propanol.

Sources & evidence

ORD record: ord-fd29eb939e1642e38d2ef8a6083e5c63
Source dataset: uspto-grants-2002_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06384233B1

Reaction notes

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