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Laurent-Robert et al., 1998 - Google Patents

Enhancement of dienophilic and enophilic reactivity of the glyoxylic acid by bismuth (III) triflate in the presence of water

Laurent-Robert et al., 1998

Document ID
12591008405860791847
Author
Laurent-Robert H
Le Roux C
Dubac J
Publication year
Publication venue
Synlett

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Snippet

Bismuth (III) trifluoromethanesulfonate (1) is found to efficiently catalyze carbonyl-Diels-Alder or carbonyl-ene reactions between glyoxylic acid and classical dienes or substituted olefins, in the presence of water. The lure of water, the most environmentally-friendly solvent, as …
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    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
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    • C07C2101/16The ring being unsaturated
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    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/30Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/333Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
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