6533b7d7fe1ef96bd12682b8

RESEARCH PRODUCT

Auxiliary-controlled stereoselective enolate protonation: Enantioselective synthesis of cis and trans annulated decahydroquinoline alkaloids

Horst KunzMarkus WeymannMartin Schultz-kukula

subject

Bicyclic moleculeStereochemistryOrganic ChemistryEnantioselective synthesisProtonationBiochemistrychemistry.chemical_compoundPumiliotoxin CchemistryDrug DiscoveryStereoselectivityEnoneCis–trans isomerismConjugate

description

Abstract The diastereoselective synthesis of the octahydroquinoline enone precursor of pumiliotoxin C is achieved via tandem Mannich-Michael reaction on N-galactosyl imines. Conjugate cuprate addition to the bicyclic enone stereoselectively forms the trans annulated 4a- epi -pumiliotoxin C skeleton in the presence of the carbohydrate auxiliary, and the cis annulated pumiliotoxin C skeleton in its absence.

https://doi.org/10.1016/s0040-4039(98)01745-6