Richter, A.A.RichterWagenknecht, W.W.Wagenknecht2022-03-082022-03-082003https://publica.fraunhofer.de/handle/publica/305633Die Erfindung betrifft ein regioselektiv substituiertes Amylosederivat, gekennzeichnet durch eine Acylveresterung der OH-Gruppe in Position O-6 der Anhydroglucoseeinheiten mit einem partiellen Substitutionsgrad DSAcyl von 85% bis 100%, bezogen auf den Gesamtsubstitutionsgrad an Acylgruppen, und/oder durch eine einheitliche Veresterung der OH-Gruppe in Position O-2 der Anhydroglucoseeinheiten mit einem partiellen Substitutionsgrad DSEster von 85% bis 100%, bezogen auf den Gesamtsubstitutionsgrad an mit dem hierfuer verwendeten Veresterungsreagens veresterten Gruppen. Das erfindungsgemaesse Amylosederivat kann weiter zu Folgeprodukten umgesetzt werden, in denen ein Teil oder alle freien OH-Gruppen teilweise oder ganz mit weiteren Substituenten substituiert sind. Es werden Verfahren fuer die Herstellung dieses Derivates bereitgestellt.DE 10218761 A UPAB: 20040107 NOVELTY - A regioselective substituted amylose derivative in which acyl esterification of the OH group in position O-6 of the anhydroglucose units with a partial degree of substitution DSacyl of 85-100% relative to the acyl groups and/or by esterification of the OH group at the 0-2 position of the anhydroglucose units with a partial degree of substitution DSester of 85-100% relative to the esterified groups with the esterification agent used is new. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a process for preparation of an acylated amylose derivative regioselective at the 0-6 position in which an amylose triacylate is deacylated with an amine with a degree of substitution less than 2.95 under homogeneous conditions. USE - The amylose derivative is useful in the preparation of secondary products in which some or all of the free OH groups are partially or completely substituted (claimed). ADVANTAGE - It has been found that amylose triacetate can be deacylated in a manner similar to the deacylation of cellulose, where the deacylation is essentially selective as with cellulose, so that acylated amylose can be synthesized with marked selectivity at the 0-6 position of the anhydroglucose units.de608668Synthese regioselektiver Ester der AmyloseA regioselective substituted amylose derivative useful in the preparation of secondary products in which some or all of the free OH groups are partially or completely substituted.patent2002-10218761