- Pd-catalyzed three-component reaction of 3-(Pinacolatoboryl)ally acetates, aldehydes, and organoboranes: A new entry to stereoselective synthesis of (Z)- anti -homoallylic alcohols
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The 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 alcohols with high levels of diastereoselectivity and alkene stereocontrol.
- Horino, Yoshikazu,Aimono, Ataru,Abe, Hitoshi
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supporting information
p. 2824 - 2827
(2015/06/16)
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- Preparation and Properties of, and Reactions with Metal-Containing Heterocycles, LX. - Investigations on the Preparation and Structure of Phosphidomolybdates
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Substitution of CO in HCO (1) = (η5-C5H5)Mo(CO)2> by the secondary phosphanes R2PH results in the formation of the hydrido complexes HPR2H (2a-c) a), C6H11 (b), C6H5 (c)>.Reaction of 2a-c with Li affords the lithium salts LiPR2H> (3a-c) with elimination of H2.Only 3a, c react with n-BuLi to give the phosphidomolybdates Li2PR2> (4a,c).These are also obtained in a straightforward way from 2a, c and n-BuLi.Upon the action of the dihalometal complexes X2 on 4c, the phosphido-bridged heterobimetallic complexes -μ-PR2- = Fe(CO)4 (5c), Ru(CO)4 (6c), (η5-C5H5)CoCO (7c)> are obtained.According to an X-ray structural analysis. 5a crystallizes in the monoclinic space group P21/n with Z = 4.
- Lindner, Ekkehard,Staengle, Michael,Hiller, Wolfgang,Fawzi, Riad
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p. 1421 - 1426
(2007/10/02)
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- Preparation of new bis(dialkylamino)phosphine species via reduction of bis(dialkylamino)halophosphines
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Four new bis(dialkylamino)phosphine species, (Me2N)2PH, CH3NCH2CH2N(CH3)PH, (CO)3Ni[(Me2N)2PH], and (CO)3Ni-[CH3NCH2CH2N(CH 3)PH], have easily been prepared in good yields through reduction of corresponding bis(dialkylamino)-halophosphines by lithium tri-sec-butylborohydride. The preparation and characterization of these compounds are discussed. An improved synthesis for obtaining quantitative yields of (CO)3NiL [L = Me2NPF2, (Me2N)2PF, CH3NCH2CH2N(CH3)PF] is also described.
- Snow, Sarah S.,Jiang, De-Xiang,Parry, Robert W.
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p. 1460 - 1463
(2008/10/08)
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