Enantiospecific Synthesis and Allylation of All-Carbon-Substituted α-Chiral Allylic Stannanes
作者:Eric S. Schmidtmann、Martin Oestreich
DOI:10.1002/anie.200901384
日期:2009.6.8
Once difficult to obtain, the title compounds can be prepared in virtually enantiomerically pure form with a bis(triorganostannyl) zinc reagent (see scheme). Subsequent diastereoselective thermal (left) and Lewis acid promoted reactions (right) illustrate the synthetic potential of these compounds.
Facile synthesis of (Z)-anti-homoallylic alcohols from 3-(pinacolatoboryl)allyl alcohols, aldehydes, and triorganoboranes via a palladium-catalyzed three-component reaction
A palladium-catalyzed three-component reaction of 3-(pinacolatoboryl)allyl alcohols, aldehydes, and triorganoboranes was developed. The present protocol provides facile access to synthetically useful (Z)-anti-homoallylic alcohols with high diastereoselectivity and high levels of alkene stereocontrol. Furthermore, single-flask reaction sequences to synthesize (Z)-anti-homoallylic alcohols starting from
Pd-Catalyzed Three-Component Reaction of 3-(Pinacolatoboryl)ally Acetates, Aldehydes, and Organoboranes: A New Entry to Stereoselective Synthesis of (<i>Z</i>)-<i>anti</i>-Homoallylic Alcohols
作者:Yoshikazu Horino、Ataru Aimono、Hitoshi Abe
DOI:10.1021/acs.orglett.5b01244
日期:2015.6.5
Pd-catalyzed three-component reaction of 3-(pinacolatoboryl)allyl acetates, aldehydes, and organoboranes is described. The reaction is initiated by the formation of an allylic gem-palladium/boryl intermediate, which then undergoes allylation of aldehydes by allylboronates followed by a coupling reaction of in situ generated (Z)-vinylpalladium acetates with organoboranes to provide the (Z)-anti-homoallylic