Lepidine

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title: "Lepidine" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["quinolines", "methyl-compounds"] topic_path: "general/quinolines" source: "https://en.wikipedia.org/wiki/Lepidine" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Watchedfields = changed | verifiedrevid = 462089974 | ImageFile = Lepidine.png | ImageSize = 150px | PIN = 4-Methylquinoline | OtherNames = Lepidine |Section1={{Chembox Identifiers | CASNo_Ref = | CASNo = 491-35-0 | ChemSpiderID_Ref = | ChEMBL_Ref = | ChEMBL = 9734 | ChemSpiderID = 13854818 | UNII_Ref = | UNII = 116169T3O8 | ChEBI_Ref = | ChEBI = 48983 | PubChem = 10285 | EC_number = 207-734-2 | Beilstein = 110926 | SMILES = Cc1ccnc2ccccc12 | StdInChI_Ref = | StdInChI =1S/C10H9N/c1-8-6-7-11-10-5-3-2-4-9(8)10/h2-7H,1H3 | StdInChIKey_Ref = | StdInChIKey = MUDSDYNRBDKLGK-UHFFFAOYSA-N |Section2={{Chembox Properties | Formula = C10H9N | MolarMass = 143.19 g/mol | Appearance = Colorless liquid | Density = 1.083 g/ml | MeltingPtC = 9 to 10 | MeltingPt_notes = | BoilingPtC = 261 to 263 | BoilingPt_notes =

Lepidine, or 4-methylquinoline, is an organic compound with the formula . It is one of the two commercially important methyl quinolines. It is a colorless liquid, although impure samples can appear yellow.

Its methyl group is fairly acidic, allowing for condensations to occur at this position, especially when the nitrogen is quaternized. It is used in the preparation of cyanine dyes.

Oxidation with selenium dioxide gives the aldehyde .

References

References

  1. (2008). "Methine Dyes and Pigments".
  2. H. A. Riley, A. R. Gray. (1935). "Phenylglyoxal". Organic Syntheses.

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quinolinesmethyl-compounds