One-Pot Synthesis of Stable Phosphorus Ylides by Three-Component Reaction between Dimethyl Acetylenedicarboxylate, Semicarbazones, and Triphenylphosphine
Protonation of the reactive 1:1 intermediate, produced in the reaction between dimethyl acetylenedicarboxylate and triphenylphosphine, by aromatic aldehyde semicarbazones leads to vinylphosphonium salts, which undergo Michael addition with the conjugate base of the NH-acid to produce highly functionalized, salt free phosphorus ylides in excellent yields.
Synthesis and Antiviral Activity of New Substituted Methyl [2-(arylmethylene-hydrazino)-4-oxo-thiazolidin-5-ylidene]acetates
作者:Aamer Saeed、Najim A. Al-Masoudi、Muhammad Latif
DOI:10.1002/ardp.201300057
日期:2013.8
A series of newmethyl [2‐(arylmethylene‐hydrazono)‐4‐oxo‐thiazolidin‐5‐ylidene]acetates (5a–o) were synthesized via cyclocondensation of thiosemicarbazones (3a–o) with dimethyl but‐2‐ynedioate (4) in good yields under solvent‐free conditions. The environmentally friendly solvent‐free protocol overcomes the limitations associated with the customary protracted solution phase synthesis and afforded the
Sharma, Laxmi Kant; Singh, Sushma; Singh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2011, vol. 50, # 1, p. 110 - 114
作者:Sharma, Laxmi Kant、Singh, Sushma、Singh
DOI:——
日期:——
Semicarbazone derivatives as urease inhibitors: Synthesis, biological evaluation, molecular docking studies and in-silico ADME evaluation
作者:Syeda Uroos Qazi、Shafiq Ur Rahman、Asia Naz Awan、Mariya al-Rashida、Rima D. Alharthy、Asnuzilawati Asari、Abdul Hameed、Jamshed Iqbal
DOI:10.1016/j.bioorg.2018.03.029
日期:2018.9
A series of hydrazinecarboxamide derivatives were synthesized and examined against urease for their inhibitory activity. Among the series, the 1-(3-fluorobenzylidene)semicarbazide (4a) (IC50 = 0.52 ± 0.45 µM), 4u (IC50 = 1.23 ± 0.32 µM) and 4h (IC50 = 2.22 ± 0.32 µM) were found most potent. Furthermore, the moleculardocking study was also performed to demonstrate the binding mode of the active hydrazinecarboxamide