Ethanol → 1'-Acetyl-5,6-dihydrospiro[1H-indolo[3,2-c]quinoline-6,4'-piperidine]

Participants

Reaction Steps

To a solution prepared from 5 g of 2-(2-aminophenyl)indole, 100 ml of ethanol and 2 ml of glacial acetic acid was added dropwise 3 ml of 1-acetyl-4-piperidone. The resultant solution was refluxed for 6 hours and thereafter cooled, whereupon a solid precipitated. Filtration and washing with ether and hexane gave 3.95 g of yellow solid, m.p. 285°-287° dec.

Provenance & Evidence