L'etude est faite sur desvinylallenes comme le benzosulfinyl-3' allenyl-1 trimethyl-2,6,6 cyclohexene。Le groupe sulfoxyde est un substituant qui non seulement exerce uneceleration du deplacement [1,5] mais aussi peut egalement Impacter le controle de lastereoselection π-faciale dans cessyntheses de trienes
Stereocontrolled Synthesis of (<i>E,Z</i>)-Dienals <i>via</i> Tandem Rh(I)-Catalyzed Rearrangement of Propargyl Vinyl Ethers
作者:Dinesh V. Vidhani、Marie E. Krafft、Igor V. Alabugin
DOI:10.1021/ol4019985
日期:2013.9.6
A novel Rh(I)-catalyzed approach to functionalized (E,Z) dienals has been developed viatandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetalation
New cycloaliphatic unsaturated ketones and their use as perfuming and odor-modifying agents in the manufacture of perfumes and perfumed products, and as flavoring and taste-modifying agents in the preparation of foodstuffs in general and imitation flavors for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products. Methods for the preparation of said cycloaliphatic unsaturated ketones.