摘要:
A method of producing 3,5,5-trimethylcyclohexa-3-ene-1-one (.beta.-isophorone) including a catalyst of an oxide or mixed oxide of at least one element of the groups IIa, VIII, Ib, IIIa and Va of the periodic system. Isomerization is carried out without the addition of an organic base. The space-time yield in the production of .beta.-isophorone by the isomerization of .alpha.-isophorone is at a level suitable for an industrial application. .beta.-isophorone is especially suitable as an intermediate product for producing ketoisophorone.
摘要:
A method of producing 3,5,5-trimethylcyclohexa-3-ene-1-one (.beta.-isophorone) by isomerization of 3,5,5-trimethylcyclohexa-2-ene-1-one (.alpha.-isophorone) in a liquid phase in the presence of a homogeneous or heterogeneous catalyst in which a mixture with a relatively low concentration of .beta.-isophorone is drawn off from the reaction container and the .beta.-isophorone isolated by vacuum distillation. .beta.-isophorone is an important synthetic structural element for the production of carotinoids, vitamins and pharmaceutical products.
摘要:
The invention relates to the preparation of optically active salts of the general formula ##STR1## from which the corresponding optically active 3-chloro-2-hydroxypropyltrimethyl ammonium chloride can be obtained by treatment with mineral acid.The L(-) form of this compound is a valuable component for the synthesis of L(-) carnitine.