18607-93-7Relevant articles and documents
Pyrazolyl asarin derivative and preparation method and application thereof
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, (2021/08/11)
The invention discloses a pyrazolyl asarin derivative, a preparation method thereof and application of the pyrazolyl asarin derivative as a bacteriostatic agent, the chemical structure of the pyrazolyl asarin derivative is shown as a general formula (f), and R is selected from hydrogen, C1-C5 alkyl, cyano, nitro or halogen. Compared with the prior art, the novel pyrazolyl asarin derivative provided by the invention has good antibacterial activity, and the compound is cheap and easy to obtain. Part of target asarin derivatives particularly have relatively strong inhibitory activity on fusarium graminearum, valsa mali, watermelon fusarium wilt and pumpkin fusarium wilt, and are expected to be used for preparing novel natural product bacteriostatic agents.
Domino Processes of Arynes Reacting with Three Classes of Nucleophiles for Organic Syntheses
Hwu, Jih Ru,Panja, Avijit,Gupta, Nitesh K.,Hu, Yu-Chen,Tan, Kui-Thong,Lin, Chun-Cheng,Hwang, Kuo-Chu,Hsu, Ming-Hua,Huang, Wen-Chieh,Tsay, Shwu-Chen
, p. 683 - 693 (2021/01/18)
Synthetic application of arynes is broadened by their reactions with neutral N-, S-, and O-containing nucleophiles to produce three types of compounds. Accordingly, 1,2-dihydroquinolines are synthesized from Schiff bases, alkynes, and arynes through a Diels-Alder reaction. Epoxides are prepared from thioethers and arynes along with aldehydes or ketones through a Johnson-Corey-Chaykovsky reaction. Phenolic ethers are produced from allyl ethers and arynes through a Claisen-type rearrangement. These target molecules, including natural products γ-asarone, asaricin, and a cholesteryl phenolic ether, are formed through reactions initiated by arynes. These new reactions share a prevailing feature of domino processes, which are carried out in a single flask and afford the desired products in good to high yields.
Expeditious synthesis of bioactive allylphenol constituents of the genus Piper through a metal-free photoallylation procedure
Protti, Stefano,Fagnoni, Maurizio,Albini, Angelo
, p. 2868 - 2871 (2007/10/03)
Nine bioactive allylphenol (anisole) derivatives (e.g. eugenol, safrole and asaricin) present in several plants of the genus Piper have been synthesized in medium to high yield via aryl cation intermediates. This expeditious metal-free procedure involves the irradiation of the corresponding chlorophenols or chloroanisoles in a polar solvent (MeCN or, better, TFE or aqueous acetonitrile) in the presence of allyltrimethylsilane. Estragole has also been synthesized starting from the corresponding fluoroderivative and diazonium salt, though in a lower yield. The Royal Society of Chemistry 2005.