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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1775945Generated: October 25, 2026

Formaldehyde → 6-chloro-9-(2-cyclopentylethyl)-2,3, 4,9-tetrahydro-2-methyl-1H-pyrido[3,4-b]indole

https://huagongshe.com/reaction/1775945

Reaction equation

Participants

RoleNameHCIDCharge
ReactantFormaldehydeHCID 712—
ReactantTrifluoroacetic acidHCID 6422—
ReactantHydrazine, (4-chlorophenyl)-, hydrochloride (1:1)HCID 71600—
Reactant(2-Bromoethyl)cyclopentaneHCID 12711948—
Reactant4,4-Diethoxy-N-methylbutan-1-amineHCID 13994547—
Reactant1-(4-Chlorophenyl)-1-(2-cyclopentylethyl)hydrazineHCID 66911627—
Reactant2-(5-chloro-1-(2-cyclopentylethyl)-1H-indol-3-yl)-N-methylethanamineHCID 66911639—
CatalystTetrabutylammonium ChlorideHCID 70681—
SolventAcetonitrileHCID 6342—
Product6-chloro-9-(2-cyclopentylethyl)-2,3, 4,9-tetrahydro-2-methyl-1H-pyrido[3,4-b]indoleHCID 44242440—

Reaction Steps

The title compound was prepared by following General Methods 2, 3 and 4 using 4-chlorophenylhydrazine hydrochloride, (2-bromoethyl)cyclopentane, and tetra-n-butylammonium chloride (General Method 2), 1-(4-chlorophenyl)-1-(2-cyclopentylethyl)hydrazine (Example 4) and 4,4-diethoxy-N-methylbutan-1-amine (General Method 3) and 2-(5-chloro-1-(2-cyclopentylethyl)-1H-indol-3-yl)-N-methylethanamine (Example 13), formaldehyde and TFA in acetonitrile (General Method 4).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09260429B2
Source datasetuspto-grants-2016_02
ORD IDord-9453cd90e89d49f1a234c0bf7f0d0b9e
Source noteuspto-grants-2016_02