HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 478716Generated: October 30, 2026
Hydrochloric Acid → HCID 69941282, compound
https://huagongshe.com/reaction/478716
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Hydrochloric Acid | HCID 313 | — |
| Reactant | Piperidine | HCID 8082 | — |
| Reactant | 5,6-Dimethoxy-1-indanone | HCID 75018 | — |
| Reactant | Oxindole | HCID 321710 | — |
| Solvent | Ethanol | HCID 702 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Product | HCID 69941282 | HCID 69941282 | 20.8% |
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
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US06642251B1 |
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| Source dataset | uspto-grants-2003_11 |
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| ORD ID | ord-93287bdc9a844ce1a9e983b1babbaba0 |
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| Source note | uspto-grants-2003_11 |
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