The synthesis of enamines in aqueous media and a process for the preparation of memory enhancing 9-amino-1,2,3,4-tetrahydracridines are described.
本文介绍了在水介质中合成烯胺和制备增强记忆的9-氨基-1,2,3,4-四氢蒽啉的过程。
A process for the preparation of enamines in aqueous media
申请人:HOECHST-ROUSSEL PHARMACEUTICALS INCORPORATED
公开号:EP0581194A1
公开(公告)日:1994-02-02
The present invention relates to a process for the preparation of enamines of the formula 1
wherein R is CN, CO₂H, or CO₂R¹ wherein R¹ is loweralkyl; Y is CH₂ or C = O ; X is hydrogen, loweralkyl, loweralkoxy, halogen, hydroxy, nitro, NHCOR² wherein R² is loweralkyl, or a group of the formula NR³R⁴ wherein R³ and R⁴ are independently hydrogen or loweralkyl; and n is 0, 1, or 2, which comprises condensing an aniline of formula 2
wherein R and X are as hereinbeforedefined with a cycloalkanone or -dione 3
wherein Y and n are as hereinbeforedefined in an aqueous medium containing an acidic promoter.
本发明涉及一种制备式 1 的烯胺的工艺
其中 R 是 CN、CO₂H 或 CO₂R¹,其中 R¹ 是低级烷基;Y 是 CH₂或 C = O;X 是氢、低级烷基、低级烷氧基、卤素、羟基、硝基、NHCOR²(其中 R² 是低级烷基)或式 NR³R⁴ 的基团(其中 R³ 和 R⁴ 独立地是氢或低级烷基);以及 n 是 0、1 或 2,其中包括缩合式 2 的苯胺。
其中 R 和 X 如本文所定义与环烷基酮或二酮缩合 3
其中 Y 和 n 如前所述,在含有酸性促进剂的水介质中。
US5247091A
申请人:——
公开号:US5247091A
公开(公告)日:1993-09-21
Synthesis and crystal structure of 1,2,3,4-tetrahydro-9-aminoacridine tetrachlorozincate(II) monohydrate
triclinic crystal system. The structure contains two crystallographically different molecules of protonated tacrine present as counter cations, the (ZnCl4) 2- complex anion and one water solvent molecule. The counter cations slightly differ in the puckering of the cyclohexene ring. The molecules of protonated tacrine are involved in different intermolecular hydrogen bonds. In the crystal, the hydrogen