6533b7d7fe1ef96bd1268dbe

RESEARCH PRODUCT

ChemInform Abstract: Conjugate Addition of Organolithium Reagents to α,β-Unsaturated Carboxylic Acids.

Ramón J. ZaragozáLuis R. DomingoElena MuñozRamon MestresMaría José Aurell

subject

chemistry.chemical_classificationAddition reactionSubstituentchemistry.chemical_elementGeneral MedicineMedicinal chemistrychemistry.chemical_compoundDeprotonationchemistryElectrophileOrganic chemistryLithiumReactivity (chemistry)AlkylConjugate

description

Abstract Conjugate addition of primary, secondary, tertiary alkyl and phenyl lithium reagents to 2-alkenoic acids affords good yields of branched saturated carboxylic acids. Methyl groups at the α- and β-carbon of the 2-alkenoic acid decrease reactivity as acceptors, and foster deprotonation, respectively. The lithium enediolate resulting from the conjugate addition can react with electrophiles. PM3 calculations are in agreement with the substituent effects.

https://doi.org/10.1002/chin.199924036