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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 478716Generated: October 30, 2026

Hydrochloric Acid → HCID 69941282, compound

https://huagongshe.com/reaction/478716

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
ReactantPiperidineHCID 8082—
Reactant5,6-Dimethoxy-1-indanoneHCID 75018—
ReactantOxindoleHCID 321710—
SolventEthanolHCID 702—
SolventDimethylformamideHCID 6228—
ProductHCID 69941282HCID 6994128220.8%

Reaction Conditions

Temperature130 °C

Reaction Steps

A mixture of 0.6 g 5,6-dimethoxy-1-indanone, 1.04 g oxindole and 2.3 ml piperidine in 4 ml dimethylformamide was heated in a sealed tube at 130° C. for 12 hours to yield an orange suspension. The mixture was added to 1N hydrochloric acid in ethanol and the solids which formed were filtered and rinsed with water and ethanol. The solid was slurried in ethanol and filtered to yield 200 mg of 3-(5,6-dimethoxyindan-1-ylidene)-1,3-dihydroindol-2-one.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06642251B1
Source datasetuspto-grants-2003_11
ORD IDord-93287bdc9a844ce1a9e983b1babbaba0
Source noteuspto-grants-2003_11