Stereoselective One-Pot Sequential Dehydrochlorination/<i>trans</i>
-Hydrofluorination Reaction of β-Chloro-α,β-unsaturated Aldehydes or Ketones: Facile Access to (<i>Z</i>
)-β-Fluoro-β-arylenals/β-Fluoro-β-arylenones
作者:Jingli Zhang、Liran Liu、Junxin Duan、Lianghu Gu、Bifeng Chen、Taolei Sun、Yuefa Gong
DOI:10.1002/adsc.201700981
日期:2017.12.19
high potential as a fluorinated synthon in organic synthesis. However, control of the Z/E stereoselectivity of multi‐substituted monofluoroalkene products in one‐pot reactions still remains a challenge. An unprecedented one‐pot approach for the highly regio‐ and stereoselective preparation of functionalized (Z)‐β‐monofluoro tri‐substituted alkenesfrom readily available β‐chloro‐α,β‐unsaturated aldehydes
Deadly KCN and pricey metal free track for accessing β-ketonitriles employing mild reaction conditions
作者:Pawan K. Sharma、Rajiv Kumar、Sita Ram、Navneet Chandak
DOI:10.1080/00397911.2021.1910846
日期:2021.6.18
synthesis of β-ketonitriles from readily accessible 3-chloropropenals using economically benign iodine, aqueous ammonia and sodium hydroxide solution, employing mild reaction conditions have been described. This report presents a convenient, inexpensive, highly toxic-matter-free and eco-friendly approach for β-ketonitriles.
synthetic chemistry. Herein, using Lewis acids promoted dual 1,3-sulfur rearrangements, we developed an approach for the direct synthesis of 1,3-dithianyl substituted dienes. This method enabled the synthesis of tri- and tetra-substituted 1,3-dienes with high stereoselectivity and good yield under mild reaction conditions.
Synthesis and biological evaluation of β-chloro vinyl chalcones as inhibitors of TNF-α and IL-6 with antimicrobial activity
作者:Babasaheb P. Bandgar、Sachin A. Patil、Balaji L. Korbad、Shivraj H. Nile、Chandrahase N. Khobragade
DOI:10.1016/j.ejmech.2010.01.050
日期:2010.6
A series of beta-chloro vinyl chalcones have been synthesized by Claisen-Schmidt condensation. beta-chloro vinyl aldehyde has been synthesized by the Vilsmayer-Hack formylation reaction. The structures of the newly synthesized compounds were confirmed by H-1 NMR, IR and Mass spectral analysis. All the compounds were evaluated for their anti-inflammatory activity (against TNF-alpha and IL-6) and antimicrobial (antibacterial and antifungal) activity. Compounds 5a, 5d, 5e, 5g and 5i exhibited promising activity against IL-6 with 58-83% inhibition at 10 mu M concentration None of the compound was found to be cytotoxic in CCK-8 cells at 10 mu M concentration. Whereas compounds 5b, 5d, Se and 5i showed very good antibacterial activity and compounds 5a, 5b, Se and 5i showed good antifungal activity.
Fringuelli, Francesco; Serena, Bernardino; Taticchi, Aldo, Journal of the Chemical Society. Perkin transactions II, 1980, p. 971 - 975