Abstract: The invention provides an excipient composition for the preparation of an amorphous solid dispersion or amorphous solid solution suitable for, i.a., 3D printing of immediate release tablets. The excipient composition comprises: a) 8-20% by weight of the excipient composition of sugar alcohol, and b) 80-92% by weight of the excipient composition of a polymer blend, the polymer blend comprising a first polymer component and a second polymer component in a weight ratio of 1:0.55-1:1.75, the first polymer component being a copolymer of 1-vinyl-2-pyrrolidone and vinyl acetate, and the second polymer component being polyethylene glycol-polyvinyl alcohol graft copolymer.

Abstract: The present invention relates to a method for producing dehydro rose oxide by reacting isoprenol and prenal in the presence of at least one sulfonic acid of formula R1—SO3H as catalyst, wherein R1 is selected from phenyl which carries 2 or 3 C1-C4-alkyl substituents, phenyl which carries one C8-C20-alkyl substituent and optionally also 1 or 2 C1-C4-alkyl substituents, and naphthyl which optionally carries 1 or 2 C1-C4-alkyl substituents.

Abstract: The present invention relates to a method for producing dehydro rose oxide by reacting isoprenol and prenal in the presence of at least one sulfonic acid of formula R1—SO3H as catalyst, wherein R1 is selected from phenyl which carries 2 or 3 C1-C4-alkyl substituents, phenyl which carries one C8-C20-alkyl substituent and optionally also 1 or 2 C1-C4-alkyl substituents, and naphthyl which optionally carries 1 or 2 C1-C4-alkyl substituents.