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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 441298Generated: October 30, 2026

Sulfuric Acid → HCID 21420509, compound

https://huagongshe.com/reaction/441298

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfuric AcidHCID 1118—
ReactantPotassium HydroxideHCID 14797—
ReactantHCID 53901600HCID 53901600—
SolventWaterHCID 962—
ProductHCID 21420509HCID 2142050997%

Reaction Conditions

Temperature130 °C

Reaction Steps

To 34,5 g of 2-acetylamino-2-ethoxycarbonyl-3-oxo-1,2,3,13b-tetrahydro-9H-pyrrolo[1,2-a]-dibenzo[c,f] azepine (oil, Rf in toluene: ethanol (9:2) = 0.5) are added 170 ml water and 10 ml concentrated H2SO4. The mixture is refluxed at 130° C. for 18 hours, then cooled down and made alcaline with KOH. The mixture is extracted wtih methylenechloride and the extracts washed with water, dried and evaporated. Melting point 186°-188° C. Yield 97%.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04039558
Source datasetuspto-grants-1977_08
ORD IDord-9184b2c9a3104bd985bb13d10ec30711
Source noteuspto-grants-1977_08