Journal ArticleDOI
Rapid chromatographic technique for preparative separations with moderate resolution
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Abstract:
(11) Potassium ferricyanide has previously been used to convert w'c-1,2-dicarboxylate groups to double bonds. See, for example, L. F. Fieser and M. J. Haddadln, J. Am. Chem. Soc., 86, 2392 (1964). The oxidative dldecarboxylation of 1,2-dlcarboxyllc acids is, of course, a well-known process. See Inter alia (a) C. A. Grob, M. Ohta, and A. Weiss, Helv. Chim. Acta, 41, 1911 (1958); and (b) E. N. Cain, R. Vukov, and S. Masamune, J. Chem. Soc. D, 98 (1969).read more
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Nucleophilic Opening of Donor-Acceptor Cyclopropanes with Indoles via Hydrogen Bond Activation with 1,1,1,3,3,3-Hexafluoroisopropanol.
TL;DR: The treatment of donor-acceptor cyclopropanes with the a strong hydrogen bond donor, HFIP, activated the cycloprostanes toward homo-Michael additions with indoles as the nucleophiles without the need for high pressure or catalysis.
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Di(benzotriazol-1-yl)methanimine: a new reagent for the synthesis of tri- and tetrasubstituted guanidines.
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1,3-Dipolare Cycloadditionen von 2-(Benzonitrilio)-2-propanid mit 4,4-Dimethyl-2-phenyl-2-thiazolin-5-thion und Schwefelkohlenstoff
TL;DR: In this paper, a cycloaddition of 2-(benzonitrilio)-2-propanide to the C, S-double bond of 7 was shown to yield a mixture of the three (1:1)-adducts 8, 12 and 13 (Schemes 3 and 6).
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Catalytic reductive carboncarbon bond-forming reactions of alkynes
TL;DR: In this paper, an enantioselective nickel/phosphine-catalyzed reductive coupling of alkynes and aldehydes provides rapid access to synthetically useful allylic alcohols with high enantiomeric excess.
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Catalytic, asymmetric synthesis of siphonarienal.
TL;DR: This paper describes the synthesis of the marine natural product, siphonarienal, an aldol reaction that constructs most of the skeleton and sets all three stereocenters of the target in one step from commercially available starting materials.