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Levulinoyl ester

After developing procedures for the activation and coupling of anomeric trichloroacetimidate and glycosyl phosphate donors as well as for the deprotection of acetyl and levulinoyl esters, we designed a synthesis utilizing all aspects of our automated chemistry. Trisaccharide 24, composed of three... [Pg.50]

The levulinoyl esters are prepared from the free hydroxyl group by treatment of levulinic acid with DCC [255,256] or l-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (EDAC) [257] in the presence of DMAP (O Scheme 38). Additionally, 3 - and 5 -0-levulinyl protected derivatives of 2 -deoxy nucleosides have been prepared by regioselective enzymatic acylation using a variety of lipases and acetonoxime levulinate as acylating agent [258]. In contrast to other ester substituents, the 0-levulinoyl group is far less prone to migration [259]. [Pg.136]

See other pages where Levulinoyl ester is mentioned: [Pg.230]    [Pg.45]    [Pg.48]    [Pg.48]    [Pg.50]    [Pg.78]    [Pg.97]    [Pg.137]    [Pg.1254]    [Pg.1016]    [Pg.119]    [Pg.458]    [Pg.58]    [Pg.77]    [Pg.159]    [Pg.261]    [Pg.507]    [Pg.173]    [Pg.193]    [Pg.346]    [Pg.359]    [Pg.361]    [Pg.165]   
See also in sourсe #XX -- [ Pg.45 ]



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Levulinoyl

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