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Poly lipase-type enzymes

The synthesis of chiral poly(depsipeptides), polymers with alternating amide and ester bonds, by lipase-catalyzed ring opening of 3-isopropyl morpholino-2,5-dione (19) was shown by Hocker and coworkers (Scheme 11.5) [26], Various lipases were tested for the bulk polymerization of these heterocyclic monomers at temperatures of 100 °C or above. PPL and lipase type III from a pseudomonas species were shown to be effective catalysts. The isolated polymers showed Mn values of 3.5-17.5 kgmol-1. The influence of reaction temperature, the amount of enzyme and the presence of water in the reaction medium were shown to be important factors on the high molecular weight fraction and were investigated in detail [26b]. Comparison of optical rotation values for polymers prepared by... [Pg.283]

See other pages where Poly lipase-type enzymes is mentioned: [Pg.122]    [Pg.551]    [Pg.154]    [Pg.121]    [Pg.247]    [Pg.509]    [Pg.184]    [Pg.27]    [Pg.34]    [Pg.156]    [Pg.114]    [Pg.13]    [Pg.400]    [Pg.114]    [Pg.51]    [Pg.1165]   
See also in sourсe #XX -- [ Pg.123 ]



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Enzymes lipase

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Lipases types

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