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Polyethylene glycol polyacrylamide PEGA

Wennemers found that tripeptide H-Pro-Pro-Asp-NH2 was a highly active and selective catalyst for asymmetric aldol reactions [44]. This peptide was immobihzed to a polymer support and used as a catalyst for the aldol reaction of p-nitrobenzal-dehyde 73 and acetone (Scheme 3.21). By using a TentaGel-supported peptide 73 the aldol adduct 69 was obtained in 89% yield with 75% ee, while a polyethylene glycol-polyacrylamide (PEGA)-supported peptide gave the same adduct in 93% yield and 79% ee [45]. [Pg.87]

Scheme 9. Chemo-enzymatic synthesis of a iV-glycopeptide on a polyethylene glycol polyacrylamide (PEGA) resin. Reagents i) cacodylate buffer pH 7.4, 5 mM MnCl2, UDP-Gal (3 eq.), GT, 23 °C, 48 h, 95% ii) 95% aqueous TEA, 23 °C, 2 h. Scheme 9. Chemo-enzymatic synthesis of a iV-glycopeptide on a polyethylene glycol polyacrylamide (PEGA) resin. Reagents i) cacodylate buffer pH 7.4, 5 mM MnCl2, UDP-Gal (3 eq.), GT, 23 °C, 48 h, 95% ii) 95% aqueous TEA, 23 °C, 2 h.
Auzanneau FI, Christensen MK, Harris SL, Meldal M, Pinto BM (1998) Synthesis and characterization of polyethylene glycol polyacrylamide copolymer (PEGA) resins containing carbohydrate ligands. Evaluation as supports for affinity chromatography. Can J Chem 76 1109... [Pg.199]

See other pages where Polyethylene glycol polyacrylamide PEGA is mentioned: [Pg.292]    [Pg.715]    [Pg.292]    [Pg.715]    [Pg.169]    [Pg.43]    [Pg.297]    [Pg.374]    [Pg.445]    [Pg.238]    [Pg.520]   
See also in sourсe #XX -- [ Pg.715 ]



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