DECARBONYLATION OF α-AND β-DIKETONES CATALYZED BY RHODIUM COMPOUNDS
نویسندگان
چکیده
منابع مشابه
Steric course of the rhodium-catalyzed decarbonylation of chiral 4-methyl-[1-3H,2-2H1]pentanal.
(R)- and (S)-4-methyl-[1-3H,2-2H1]pentanal were prepared from L- and D-leucine via leucic acid and (S)- and (R)-4-methyl-[2-2H1]pentanoic acid. Decarbonylation of these samples with tris-(triphenylphosphine)rhodium chloride followed by Kuhn-Roth oxidation of the resulting 2-methylbutane gave chiral acetic acid of 35% e.e. S and 31% e.e. R configuration, respectively. The decarbonylation reactio...
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A new reaction for the rhodium-catalyzed geminal-difunctionalization-based fluorination is presented. The substrates are aromatic and aliphatic diazocarbonyl compounds. As the fluorine source a stable and easily accessible benziodoxole reagent was used. A variety of alcohol, phenol, and carboxylic acid reagents were employed to introduce the second functionality. The reaction was extended to tr...
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[reaction: see text] A large and normal nitrogen-15 kinetic isotope effect of 1.035 +/- 0.003 provides direct support for the proposed mechanism for the rhodium-catalyzed carbene formation from diazo compounds, which involves the fast formation of a metal-diazo complex followed by rate-limiting extrusion of N2. The large magnitude of the KIE indicates extensive C-N bond fission in the transitio...
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ژورنال
عنوان ژورنال: Chemistry Letters
سال: 1974
ISSN: 0366-7022,1348-0715
DOI: 10.1246/cl.1974.215