Introduction of a clean and promising protocol for the synthesis of β-amino-acrylates and 1,4-benzoheterocycles: an emerging innovation
作者:Garima Choudhary、Rama Krishna Peddinti
DOI:10.1039/c1gc15701a
日期:——
A highly efficient, elegant and simple procedure with exceptionally mild conditions has been proposed for the synthesis of β-amino-acrylate derivatives and an array of biologically and pharmaceutically active benzoheterocycles. The protocol offers a valuable alternative to known methods and will find applications in the field of green synthesis. The regio- and stereo-chemistry of the products were established by IR, NMR and single crystal X-ray analysis.
Vinyltriphenylphosphonium salt mediated synthesis of 1,4-benzoxazine and coumarin derivatives
作者:Issa Yavari、Mehdi Adib、Leila Hojabri
DOI:10.1016/s0040-4020(02)00758-5
日期:2002.8
Protonation of the reactive 1:1 intermediate produced in the reaction between triphenylphosphine and dimethyl acetylenedicarboxylate by 2-aminophenol, 3-aminophenol, 4-aminophenol and 2-amino-3-hydroxypyridine leads to vinyltriphenylphosphonium salts, which undergo Michael addition with the conjugate base of the aminophenol or aminohydroxypyridine to produce highly functionalized heterocyclic compounds. (C) 2002 Elsevier Science Ltd. All rights reserved.
Design, synthesis and antimycobacterial activity of benzoxazinone derivatives and open-ring analogues: Preliminary data and computational analysis
作者:Daniele Zampieri、Maria Grazia Mamolo、Julia Filingeri、Sara Fortuna、Alessandro De Logu、Adriana Sanna、Davide Zanon
DOI:10.1016/j.bmcl.2019.07.025
日期:2019.9
This study examines in depth benzoxazine nucleus for antimycobacterial property. We synthesized some benzoxazin-2-one and benzoxazin-3-one derivatives, which were tested for activity against a panel of Mycobacterium tuberculosis (Mtb) strains, including H37Ra, H37Rv and some resistant strains. Several compounds displayed a high antimycobacterial activity and the three isoniazid analogue derivatives 8a-c exhibited a MIC range of 0.125-0.250 mu g/mL (0.37-0.75 mu M) against strain H37Ra, therefore lower than the isoniazid reference drug. Two benzoxazin-2-one derivatives, 1c and 5j, together with isoniazid-analogue compound 8a, also revealed low MIC values against resistant strains and proved highly selective for mycobacterial cells, compared to mammalian Vero cells. To predict whether molecule 8a is able to interact with the active site of InhA, we docked it into the crystal structure; indeed, during the molecular dynamic simulation the compound never left the protein pocket. The more active compounds were predicted for ADME properties and all proved to be potentially orally active in humans.