Design of a New Glutamine–Fipronil Conjugate with α-Amino Acid Function and Its Uptake by <i>A. thaliana</i> Lysine Histidine Transporter 1 (<i>AtLHT1</i>)
Creating novel pesticides with phloem mobility is essential for controlling insects in vascular tissue and root, and conjugating existing pesticides with amino acid is an effective approach. In order to obtain a highly phloem-mobile candidate for efficient pesticides, an electro-neutral l-glutamine–fipronil conjugate (l-GlnF) retaining α-aminoacidfunction was designed and synthesized to fit the substrate
nanogels containing Gd(III) or Dy(III) chelates were prepared and proposed as potential candidates for T1 and T2 MRI contrast agents. These samples exhibit remarkable chemical stability in biological fluids and demonstrate enhanced longitudinal and transverse relaxivity and MRI contrast when compared to commercially available probes, particularly at high magnetic field strengths.
作者:Srijana Subba、Sumit Saha、Susanta Mandal、Amlan Jyoti Ghosh、Tilak Saha
DOI:10.1016/j.tetlet.2022.154081
日期:2022.9
The firsttotalsynthesis of aspergillolide has been accomplished starting from commercially available d-glutamic acid, (S)-glycidol and (R)-3-butyn-2-ol as chiral resources. The key steps of presented convergent synthetic approach for the totalsynthesis of aspergillolide are epoxide ring opening reaction and ring closing metathesis (RCM). A preliminary antimicrobial assay of the synthesized compound
曲霉内酯的首次全合成是从市售的d-谷氨酸、( S )-缩水甘油和 ( R )-3-butyn-2-ol 作为手性资源开始完成的。所提出的用于全合成曲霉内酯的聚合合成方法的关键步骤是环氧化物开环反应和闭环复分解 (RCM)。还研究了合成化合物的初步抗菌试验。