An efficient approach to the asymmetric total synthesis of (–)-anisodine
摘要:
-Anisodine (L-6,7-epoxy-3-tropyl-alpha-hydroxytropate), which was isolated from the medicinal plant Scopolia tanguticus Maxim, was the first efficiently prepared using 6-beta-acetyltropine as the starting material via a key step of the Sharpless asymmetric dihydroxylation (AD). The intermediate compounds 10 and 11 showed promising cholinergic activity. (c) 2006 Elsevier SAS. All rights reserved.
Zur Chemie von Tropan-Derivaten, III Darstellung von Nor-(—)-scopolamin sowie einiger Norscopin- und Scopinester
作者:Gottfried Werner、Rudolf Schickfluβ
DOI:10.1002/jlac.19697290119
日期:1969.12.12
Durch oxydative Entmethylierung von (—)-Scopolamin (1) mit KMnO4 wird in einfacher Weise Nor-(—)-scopolamin (2) erhalten. Einige Oxydationsnebenprodukte, N-Formylnor-(—)-scopolamin (5), N-Formyl-apo-norscopolamin (4) und Apo-norscopolamin (3), werden isoliert. Die Synthesen von (—)-β-Chlor-α-phenyl-propionsäure-norscopinester· HCL (6), 3·HCl, α.β-Dihydroxy-α-phenyl-propionsäure-scopinester·HCl, α.
A hardcoat composition comprises (a) one or more epoxy silane compounds, (b) one or more epoxy-functionalized perfluoropolyether acrylate oligomers, and (c) photoacid generator.