6533b853fe1ef96bd12ac066

RESEARCH PRODUCT

A Modular Synthesis of Polysubstituted Indolizines

Till OpatzMurat Kucukdisli

subject

Bromoacetonitrilechemistry.chemical_compoundchemistryOrganic ChemistryPyridineOrganic chemistryNitroalkaneIndolizinePyridiniumPhysical and Theoretical ChemistryCycloadditionCyanohydrin

description

The N-alkylation of pyridines with cyanohydrin triflates or α-halonitriles furnishes 1-(1-cyanoalkyl)pyridinium salts that can react with nitroolefins under basic conditions to furnish polysubstituted indolizines. Overall, the indolizine core can be constructed from a pyridine, two aldehydes, and a nitroalkane, and no undesired functional groups remain in the products. When bromoacetonitrile was used for the N-alkylation, indolizine-3-carbonitriles were obtained instead. The pyridine component may be replaced by other azines, giving rise to related heterocyclic systems.

https://doi.org/10.1002/ejoc.201200424