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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 522867Generated: October 31, 2026

Sulfuric Acid → 2-Benzyl-2,3,4,5-tetrahydro-1H-pyrido(4,3-b)indole

https://huagongshe.com/reaction/522867

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfuric AcidHCID 1118—
ReactantPhenylhydrazineHCID 7516—
Reactant1-Benzyl-4-piperidoneHCID 19220—
Solvent1,4-DioxaneHCID 31275—
Product2-Benzyl-2,3,4,5-tetrahydro-1H-pyrido(4,3-b)indoleHCID 27543895%

Reaction Steps

1-Benzyl-4-piperidone (1 mmol) was added dropwise to a stirred suspension of phenyl hydrazine (1 equiv.) in a solution of 7% H2SO4 (20 mL) in 1,4-dioxane (20 mL). The reaction mixture was heated at reflux for 18 h then cooled to RT. The solvent was evaporated and the residue recrystallized to afford 2-benzyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (95%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09334269B2
Source datasetuspto-grants-2016_05
ORD IDord-e799155e81a64b13a45fb0c2ff99f22d
Source noteuspto-grants-2016_05