摘要:
Suggested is a process for making acyclovir pro-drugs by esterification of 9(2-hydroxyethyoxymethyl)-guanosine (Acyclovir) with an acylation agent, which is characterised in that the reaction is conducted in the presence of a solvent which is chosen from the group of dialkyl amides.
摘要:
Suggested is a process for the regio-selective manufacture of disaccharides or oligosaccharides by transglycosilation or hydrolysis of a carbohydrate donator molecule [G-R] and a glycosyl acceptor molecule [A] in the presence of a glycosidase in the presence of at least one dialkyl amide.
摘要:
Suggested is the use of polyesters obtained from the condensation of (i) unsaturated monocarboxylic acids, (ii) di- and/or polycarboxylic acids, and (iii) polyols as auxiliary agents for asphalt and bitumen compositions.
摘要:
Suggested are new aqueous compositions for road construction, comprising (a) Asphalt or bitumen, (b) Polymeric emulsifiers, obtainable by esterification of alkanolamines with mixtures of mono- and dicarboxylic acids and/or their quaternisation products, and optionally (c) Non-ionic, cationic and/or amphoteric co-emulsifiers, and/or (d) Solvents.
摘要:
Suggested are aqueous emulsions, comprising (a) Dialkylamides and (b) Non-ionic surfactants. The emulsions have been found to act as rather effective pitch-control systems in the making of paper.