All-Catalytic, Efficient, and Asymmetric Synthesis of α,ω-Diheterofunctional Reduced Polypropionates via “One-Pot” Zr-Catalyzed Asymmetric Carboalumination−Pd-Catalyzed Cross-Coupling Tandem Process
作者:Tibor Novak、Ze Tan、Bo Liang、Ei-ichi Negishi
DOI:10.1021/ja043534z
日期:2005.3.9
A highly efficientmethod for the synthesis of stereochemically pure (>/=99% ee and >50/1 dr) alpha,omega-diheterofunctional reducedpolypropionates has been developed. The essential features of the method are represented by the conversion of inexpensive styrene into 2-methyl-4-phenyl-1-pentanol (1) in 50% yield over two steps from styrene via Zr-catalyzedasymmetriccarboalumination (ZACA) reaction
Chirality and Fragrance Chemistry: Stereoisomers of the Commercial Chiral Odorants Muguesia and Pamplefleur
作者:Agnese Abate、Elisabetta Brenna、Claudio Fuganti、Francesco G. Gatti、Tommaso Giovenzana、Luciana Malpezzi、Stefano Serra
DOI:10.1021/jo048445j
日期:2005.2.1
The work describes the enzyme-mediatedpreparation and the odor evaluation of the single stereoisomers of the commercial odorants Muguesia and Pamplefleur. The synthetic approach to Muguesia stereoisomers helped to clear the assignment of the relative configuration of intermediate diols 5. The odor response of Pamplefleur isomers was found to be rather unusual. No stereoisomer prevailed, but each one
A one‐step homologation protocol for the synthesis of natural products containing deoxypropionate motif is described by the combination of Zr‐catalyzed asymmetric carboalumination of alkenes (ZACA)‐Pd‐catalyzed vinylation and ZACA–oxidation reaction. In contrast to most other synthetic strategies used to date that typically require three steps per deoxypropionate unit due to the functional‐group interconversions