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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1264125Generated: November 2, 2026

Hydrochloric Acid → 8-Methyl-5,10-dihydroindeno[1,2-b]indole

https://huagongshe.com/reaction/1264125

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactant1-IndanoneHCID 6735—
Reactant4-Methylphenylhydrazine monohydrochlorideHCID 12504—
SolventEthanolHCID 702—
Product8-Methyl-5,10-dihydroindeno[1,2-b]indoleHCID 2224707991.9%

Reaction Conditions

Temperature25 °C

Reaction Steps

In a 250 mL round bottom flask, 180 mL of ethanol, 10 mL of HCl, 16.3 grams of 1-indanone (0.124 mole) and 19.5 grams of p-methylphenylhydrazine hydrochloride (0.124 mole) are heated to reflux for six hours. After cooling to 25° C., the resulting precipitate is filtered, washed twice with 100 mL of 10% aqueous ethanol, twice with 50 mL of water, and then twice with 50 mL of hexane. After drying, 25 grams of 8-methyl-5, 10-dihydroindeno[1,2-b]indole is obtained.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06541583B2
Source datasetuspto-grants-2003_04
ORD IDord-2d127d65184a454bb04ee95ebfc3b53d
Source noteuspto-grants-2003_04