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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 751514Generated: November 1, 2026

6-Chloroindole → 6-Chloro-2,3-dihydro-1h-indole

https://huagongshe.com/reaction/751514

Reaction equation

Participants

RoleNameHCIDCharge
Reactant6-ChloroindoleHCID 87111—
ReactantSodium cyanoborohydrideHCID 5003444—
SolventAcetic AcidHCID 176—
SolventEthyl AcetateHCID 8857—
Product6-Chloro-2,3-dihydro-1h-indoleHCID 258567117.7%

Reaction Steps

Dissolve 6-chloro-1H-indole (2 g, 0.013 mol) in acetic acid (10 mL) under nitrogen. Add sodium cyanoborohydride (1.24 g, 1.5 eq) and stir 20 minutes at room temperature. Dilute with ethyl acetate and extract with sodium hydroxide (5 N aqueous). Dry over magnesium sulfate, filter and concentrate to give 2.35 g (116%) crude product. MS (ES, m/z): 154.0 (M+1).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07405305B2
Source datasetuspto-grants-2008_07
ORD IDord-be1641daf6684952910952a4da866c44
Source noteuspto-grants-2008_07