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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 478715Generated: October 30, 2026

Hydrochloric Acid → HCID 57151150, compound

https://huagongshe.com/reaction/478715

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantPiperidineHCID 8082—
ReactantOxindoleHCID 321710—
ReactantHCID 18002662HCID 18002662—
SolventWaterHCID 962—
SolventDimethylformamideHCID 6228—
ProductHCID 57151150HCID 5715115030.1%

Reaction Conditions

Temperature130 °C

Reaction Steps

A mixture of 0.66 g 5-methoxyindan-3-one acetic acid, 2.4 g oxindole and 1.0 ml piperidine in 3 ml of dimethylformamide was heated in a sealed tube at 130° C. for 14 hours. Three ml of 6N hydrochloric acid was added to the cooled reaction mixture followed by 3 ml of water. The supernatant was then decanted. The oily residue was heated in 5 ml of ethanol until it dissolved, the solution was then cooled and water was added. After standing overnight, a solid formed which was filtered and washed with ethanol. The solid was slurried in 4 ml of ethyl acetate at 70° C. for 45 minutes, filtered and suctioned dried to give 300 mg of [6-methoxy-3-(2-oxo-1,2-dihydroindol-3-ylidene)-indan-1-yl]-acetic acid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06642251B1
Source datasetuspto-grants-2003_11
ORD IDord-11df8e1438df4a4fba31bd56555f69c1
Source noteuspto-grants-2003_11