A GeCl2-mediated addition reaction of α-(N-phthaloylamino)allylic stannane to aldehydes was achieved to give 1,2-amino alcohol derivatives in high anti-selectivity. Various types of aromatic and aliphatic aldehydes were applicable. The synthesized N-phthaloylamino alcohols were smoothly transformed to aminoalcohols by conventional methods with no loss of stereochemistry.
Synthesis and absolute configuration of optically active E-1-alkoxymethoxy-but-2-eny(tri-n-butyl)stannanes: stereoselective reactions with aldehydes
作者:Vincent J. Jephcote、Andrew J. Pratt、Eric J. Thomas
DOI:10.1039/c39840000800
日期:——
(1R)- and (1S)-1-[(–)-menthoxymethoxy]-E-but-2-enyl(tri-n-butyl)stannanes(5) and (6), whose configurations at C(1) were assigned by correlation with (2R)-and (2S)-pentan-2-ol, react stereoselectively on heating with benzaldeyde to give (3S,4R)- and (3R, 4R)-4hydroxy-3-methyl-cis-1,2-enol ethers (11) and (13), respectively.
Solid-Support Synthesis of 1,2-Diols and <i>γ</i>-Lactones Through Addition of <i>α</i>-(Benzoyloxy)crotylindium Reagents to Aldehydes
作者:Janine Cossy、Chrystelle Rasamison、Domingo Gomez Pardo、James A. Marshall
DOI:10.1055/s-2001-13367
日期:——
A procedure for the solid phase synthesis of 1,2-diols and γ-lactones from α-(hydroxy)crotylstannane has been developed through transmetalation with InBr3. A variety of 1,2-diols and γ-lactones were synthesized in satisfactory yields and, in some cases, with excellent diastereoselectivity. The products are formed free of tin contamination.
Highly stereoselective synthesis of vicinal diols by stannous chloride-mediated addition of hydroxyallylic stannanes to aldehydes
作者:Makoto Yasuda、Tatsuya Azuma、Kensuke Tsuruwa、Srinivasarao Arulananda Babu、Akio Baba
DOI:10.1016/j.tetlet.2009.01.137
日期:2009.7
A new protocol for the synthesis of vicinaldiols was accomplished by the reaction of unprotected α-hydroxymethylmetals, as hydroxymethyl anion equivalents, with aldehydes. The treatment of hydroxyallylic stannanes, which were prepared from α,β-unsaturated aldehydes and Bu3SnLi in situ, with various aldehydes gave but-3-en-1,2-diols in the presence of SnCl2. The stereochemistry of the diol and olefin
Chiral Transfer in the Reaction of Aminoallylic Stannanes with Carbonyls in Two Different Modes using Tin(II) and Indium(III) Halides for the Synthesis of Each Enantiomer
作者:Makoto Yasuda、Yoshitaka Nagano、Hiroshi Yunoki、Kensuke Tsuruwa、Akio Baba
DOI:10.1021/om500768e
日期:2014.8.11
The reaction of homochiral aminoallylic stannanes with aldehydes gave carbonyl adducts of amino alcohols in the presence of either SnCl2 or InBr3. Both additives afforded the products in opposite absolute stereochemical configurations. The controlled chirality was ascribed to the different transmetalation pathways of SnCl2 and InBr3.