Synthesis of Tyrosol 1,2,3-Triazole Derivatives and Their Phytotoxic Activity against <i>Euphorbia heterophylla</i>
作者:Cristiane Aparecida Franco、Toshik Iarley da Silva、Marlon Gomes Dias、Bruno Wesley Ferreira、Bianca Lana de Sousa、Guilherme Mateus Bousada、Robert Weingart Barreto、Boniek Gontijo Vaz、Gesiane da Silva Lima、Marcelo Henrique dos Santos、José Antônio Saraiva Grossi、Eduardo Vinícius Vieira Varejão
DOI:10.1021/acs.jafc.1c06012
日期:2022.3.9
The synthesis and phytotoxic activity of a series of tyrosol 1,2,3-triazolederivatives are reported herein. Target compounds were synthesized through the copper(I)-catalyzed azide-alkyne cycloaddition reaction (CuAAC), known as click reaction, and these were tested for phytotoxic activity on leaves of wild poinsettia (Euphorbia heterophylla), fleabane (Conyza sumatrensis), and tropical spiderwort
aging, sagging, and wrinkling, as well as inflammation and bacterial infections. In this study, to identify novel hyaluronidase inhibitors, we applied click chemistry for the modular synthesis of 370 triazoles in 96-well plates, starting with biphenyl azide. Utilizing an optimized turbidimetric screening assay in microplates, we identified Fmoc-containing triazoles and , as well as quinoline-containing
Monofluoroalkenes are stable and lipophilic amide bioisosteres used in medicinal chemistry. However, efficient and stereoselective methods for synthesizing Z-monofluoroalkenes are underdeveloped. We envisage (Z)-β-fluoro-vinyl iodonium salts (Z-FVIs) as coupling partners for the diverse and stereoselectivesynthesis of Z-monofluoroalkenes. Disclosed herein is the development and application of a silver(I)-catalyzed
单氟烯烃是用于药物化学的稳定且亲脂的酰胺生物等排体。然而,用于合成Z-单氟烯烃的有效且立体选择性的方法尚未开发。我们设想(Z) -β-氟乙烯基碘鎓盐 ( Z -FVI) 作为偶联伙伴,用于Z -单氟烯烃的多样化和立体选择性合成。本文公开了银(I)催化方法的开发和应用,用于在一步中从炔烃获得具有独特的Z-立体选择性和区域选择性的广泛( Z )-FVI。实验和计算研究深入了解催化循环的机制和银 (I) 催化剂的作用,并通过几种立体定向衍生化探索 ( Z )-FVI 的反应性。
Determination of the Ch acidity of certain ethyne ethers by polarographic reduction of their mercury derivatives
作者:A. Kh. Filippova、K. P. Butin、O. I. Margorskaya、G. G. Naumova、G. S. Lyashenko、N. M. Deriglazov、N. S. Vyazankin
DOI:10.1007/bf00952186
日期:1981.8
Synergism by Propynyl Aryl Ethers in Permethrin-Resistant Tobacco Budworm Larvae,<i>Heliothis virescens</i>
作者:Thomas M. Brown、Patricia K. Bryson、Gregory T. Payne
Synergists were used to diagnose possible mechanisms of permethrin resistance in permethrin-selected strains of the tobacco budworm, Heliothis virescens (F.). In addition to permethrin, these strains of the tobacco budworm were resistant to alpha-cyano-pyrethroid insecticides, organophosphorus insecticides and DDT. The monooxygenase-inhibiting prop-2-ynyl aryl ethers were the only effective synergists of permethrin among 16 candidates tested. The most effective synergist was 1,2,4-trichloro-3-(2-propynyloxy)benzene. Piperonyl butoxide, a common monooxygenase-inhibiting synergist in other species and tobacco budworm strains, was inactive. These results suggested the presence and contribution of an unusual monooxygenase in the enzymatic detoxication of permethrin. DDT cross-resistance, which was not synergized, and broad pyrethroid cross-resistance supported previous evidence for target site insensitivity as a second pyrethroid-resistance mechanism in these strains. The actions of S,S,S-tributyl phosphorotrithioate (TBPT) and triphenyl phosphate (TPP) suggested that hydrolytic detoxication, important in methyl parathion-resistance tobacco budworm strains, had little or no role in conferring pyrethroid resistance in these strains.