6533b85afe1ef96bd12b8c83

RESEARCH PRODUCT

Double diastereoselection in aldol reactions mediated by dicyclohexylchloroborane between L-erythrulose derivatives and chiral aldehydes. The Felkin-Anh versus Cornforth dichotomy.

Harald RoeperJ. Alberto MarcoMiguel CardaE. FalomirSantiago Díaz-oltraJ. Murga

subject

chemistry.chemical_classificationReaction mechanismchemistryAldol reactionStereochemistryOrganic ChemistryAldol condensationL-ERYTHRULOSEAldehyde

description

Both matched and mismatched diastereoselections have been observed in aldol reactions of the B,B-dicyclohexylboron enolate of a protected l-erythrulose derivative with a range of chiral aldehydes. The stereochemical outcome of reactions with alpha-methyl aldehydes can be adequately explained within the Felkin-Anh paradigm. In the case of alpha-oxygenated aldehydes, however, strict adherence to this model does not allow for a satisfactory account of the observed results. In such cases, the Cornforth model provides a much better explanation.

yearjournalcountryeditionlanguage
2003-10-25The Journal of organic chemistry
10.1021/jo035159jhttps://pubmed.ncbi.nlm.nih.gov/14575488