55001-09-7Relevant articles and documents
Reduction of Electron-Deficient Alkenes Enabled by a Photoinduced Hydrogen Atom Transfer
Larionova, Natalia A.,Ondozabal, Jun Miyatake,Cambeiro, Xacobe C.
supporting information, p. 558 - 564 (2020/12/07)
Direct hydrogen atom transfer from a photoredox-generated Hantzsch ester radical cation to electron-deficient alkenes has enabled the development of an efficient formal hydrogenation under mild, operationally simple conditions. The HAT-driven mechanism is supported by experimental and computational studies. The reaction is applied to a variety of cinnamate derivatives and related structures, irrespective of the presence of electron-donating or electron-withdrawing substituents in the aromatic ring and with good functional group compatibility. (Figure presented.).
Synthesis technology of C-Fos/AP-1 inhibitor
-
Paragraph 0039; 0040; 0041; 0042; 0043, (2019/01/08)
The invention belongs to the technical field of pharmaceutical synthesis and especially relates to a synthesis technology of a C-Fos/AP-1 inhibitor. Starting from cheap raw materials 2,4-dimethoxybenzoic acid and 2-methoxyphenylpropionic acid, acid chloride is prepared by using thionyl chloride, and a Friedel-Crafts acylation reaction is carried out under the catalysis of aluminium trichloride soas to obtain a coupled product; then, pyridine hydrobromide and sodium chloride are used to react at 160 DEG C for 30 minutes to complete the demethylation for synthesis of lactonic ring by one step,and the product can be directly used in the next reaction without purification; the cyclopentyl group is introduced by nucleophilic substitution; the lactone ring is opened to form methyl ester; afterpurification, a benzoisoxazolyl group is introduced by nucleophilic substitution, and a protecting group is taken off to prepare the final product T5224. The route of the invention is short, and onlythe Friedel-Crafts acylation, lactone ring opening and introduction of the benzoisoxazolyl group require the step of purification. The cost of the raw materials is low, and the reaction time of the process route is short. The synthesis technology is suitable for industrial production.
Comparison of Phenylacetates with Benzoates and Phenylpropanoates as Antifeedants for the Pine Weevil, Hylobius abietis
Unelius, C. Rikard,Bohman, Bj?rn,Nordlander, G?ran
, p. 11797 - 11805 (2018/11/21)
This study concludes an extensive investigation of antifeedants for the pine weevil, Hylobius abietis (Coleoptera: Curculionidae), an economically important pest of planted conifer seedlings. Building on the previously reported antifeedant effects of benzoates and phenylpropanoids (aromatic compounds with one- or three-carbon-atom substituents on the benzene ring), we here report the antifeedant effects of compounds with two-carbon-atom side chains (i.e., phenylacetates). We also present new results; the best antifeedants from the benzoate class were tested at 10-fold lower concentrations in order to find the optimal antifeedants. Generally, for all three compound classes, efficient antifeedants were found to have one or two methyl, chloro, or methoxy substituents on the aromatic ring. For monosubstituted phenylpropanoids, the substituent preferably should be in the para-position. In the search for synergistic antifeedant effects among the three compound classes, combinations of compounds from the three classes were tested in binary and ternary mixtures.
