6533b850fe1ef96bd12a81de

RESEARCH PRODUCT

ChemInform Abstract: The Mechanism of Formation of 3H,9H-Pyrano(3,4-b)indol-3-ones from 3- Indolalkanoic Acids.

Ulf PindurMercedes Medio-simónHoushang Erfanian-abdoust

subject

Acetic anhydridechemistry.chemical_compoundChemistryStereochemistryOrganic chemistryGeneral MedicineLewis acids and basesMechanism (sociology)

description

The mechanism of the formation of 1-methyl-3H,9H-pyrano[3,4-b]indol-3-one (4) from the corresponding 3-indolacetic acid 1 is discussed. The suggested mechanism is substantiated by the isolation of a stable intermediate 2 and its transformations in the presence of acetic anhydride and/or Lewis acids.

https://doi.org/10.1002/chin.199135142