One-Pot Enantioselective Formation of Eight-Membered Rings from Alkenyl Fischer Carbene Complexes and Ketone Enolates
作者:José Barluenga、Alejandro Diéguez、Félix Rodríguez、Josefa Flórez、Francisco J. Fañanás
DOI:10.1021/ja0264551
日期:2002.8.1
Eight-membered carbocycles with up to five new stereogenic centers are enantioselectively obtained following a one-pot procedure that involves the coupling of three components: an alkenylFischercarbenecomplex, a ketone enolate, and allyl lithium.
Tandem Enantioselective Conjugate Addition−Cyclopropanation. Application to Natural Products Synthesis
作者:Alexandre Alexakis、Sébastien March
DOI:10.1021/jo026262w
日期:2002.12.1
A tandem asymmetric conjugateaddition-cyclopropanation was developed, in which a cyclic or linear enone was converted to a TMS-protected 3-substituted-cyclopropanol in an efficient one-pot reaction. These compounds were then selectively cleaved to yield alpha-methyl-beta-alkyl ketones, alpha-methylene-enones, or chain extended gamma-alkyl-enones. This methodology was applied to the formal total synthesis
Umpolung Reactivity of Alkenyl Fischer Carbene Complexes, Copper Enolates, and Electrophiles
作者:José Barluenga、Abraham Mendoza、Alejandro Diéguez、Félix Rodríguez、Francisco J. Fañanás
DOI:10.1002/anie.200601364
日期:2006.7.17
Tandem Asymmetric Conjugate Addition−Silylation of Enantiomerically Enriched Zinc Enolates. Synthetic Importance and Mechanistic Implications
作者:Oliver Knopff、Alexandre Alexakis
DOI:10.1021/ol026644o
日期:2002.10.1
cyclic and acyclic enones, could be trapped, quantitatively, as silyl enol ethers with TMSOTf in apolar solvents or with TMSCI and NEt3. These enantiomerically enriched silyl enol ethers were submitted to four synthetic transformations to show their synthetic utility. The zinc enolates obtained from acyclic enones were found to be configurationally stable, as shown by the stereochemistry of the silyl