2447-77-0Relevant academic research and scientific papers
Synthesis, crystallographic, computational and molecular docking studies of new acetophenone-benzoylhydrazones
Ajayeoba, Temitope A.,Woods, Joseph O.,Ayeni, Ayowole O.,Ajayi, Tomilola J.,Akeem, Raji A.,Hosten, Eric C.,Akinyele, Olawale F.
, (2021/04/15)
Three aroylhydrazones, acetophenone-Benzoylhydrazone (I), p-hydroxy-acetophenone-benzoylhydrazone (II) and p-nitro- acetophenone-benzoylhydrazone (III) have been synthesized and further analyzed with the aid of IR, UV-Vis, and NMR spectroscopic and X-ray Crystallographic techniques. The optimized molecular structures were determined by Density Functional Theory (DFT) using the B3LYP function comprising the 6-311++G (2d, 2p) basis set. The calculated and experimental results for the NMR spectroscopic technique were observed to be consistent. The two reported crystals are monoclinic in the same space group of P21/c. Hirshfeld surface analyses revealed H···H as the most important intermolecular interactions in compounds II and III. The molecular docking of the compounds against three enzymes - aldose reductase, aldehyde reductase, and β-glucosidase were also carried out where compound III displayed the best inhibition of the enzymes with a binding energy of -11.30, -9.58 and -11.10 Kcal mol?1 against aldose reductase, aldehyde reductase, and β- glucosidase respectively.
Efficient [(NHC)Au(NTf2)]-catalyzed hydrohydrazidation of terminal and internal alkynes
Heidrich, Maximillian,Plenio, Herbert
supporting information, p. 2080 - 2086 (2020/09/18)
The efficient hydrohydrazidation of terminal (6a–r, 18 examples, 0.1–0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a–j, 10 examples, 0.2–0.5 mol % [(NHC)Au(NTf2)], T = 60–80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.
Dinuclear gold(I)-N-heterocyclic carbene complexes: Synthesis, characterization, and catalytic application for hydrohydrazidation of terminal alkynes
Yadav, Seema,Ray, Sriparna,Singh, Ajeet,Mobin, Shaikh M.,Roy, Tapta Kanchan,Dash, Chandrakanta
, (2020/07/27)
Dinuclear gold(I)-N-heterocyclic carbene complexes were developed for the hydrohydrazidation of terminal alkynes. The gold(I)-N-heterocyclic carbene complexes 2a-2b were synthesized in good yields from silver complexes synthesized in situ, which in turn were obtained from the corresponding imidazolium salts with Ag2O in dichloromethane as a solvent. The new air-stable gold(I)-NHC complexes, 2a-2b, were characterized using NMR spectroscopy, elemental analysis, infrared, and mass spectroscopy studies. The gold(I) complex 2a was characterized using X-ray crystallography. Bis-N-heterocyclic carbene–based gold(I) complexes 2a-2b exhibited excellent catalytic activities for hydrohydrazidation of terminal alkynes yielding acylhydrazone derivatives. The working catalytic system can be used in gram-scale synthesis. In addition, the catalytic reaction mechanism of the hydrohydrazidation of terminal alkynes by gold(I)-NHC complex was studied in detail using density functional theory.
Copper catalysed cross-dehydrogenative coupling (CDC) reaction of 4-thiazolidinone with terminal alkyne
Shaikh, Mohammedumar M.,Patel, Anuj P.,Chikhalia, Kishor H.
, p. 475 - 485 (2019/01/04)
Cross dehydrogenative coupling (CDC) strategy has been employed for C-alkynylation of 4-thiazolidinone with terminal alkyne under copper catalysis. Present reaction involves coupling of C(sp3) adjacent to sulfur of 4-thiazolidinone with C(sp) of terminal alkyne under CDC strategy is unprecedented to the best of our knowledge. Significant functional group tolerance, considerable yield and DFT study for mechanism make this synthetic task more interesting and compatible.
Gold-Catalyzed Hydrohydrazidation of Terminal Alkynes
Zimin, Dmitry P.,Dar'In, Dmitry V.,Rassadin, Valentin A.,Kukushkin, Vadim Yu.
supporting information, p. 4880 - 4884 (2018/08/24)
Facile gold-catalyzed hydrohydrazidation of alkynes with various hydrazides R2CONHNH2 (R = Alk or Ar; including those with an additional nucleophilic moiety) in the presence of Ph3PAuNTf2 (6 mol %) leading to a wide range of substituted keto-N-acylhydrazones (18 examples) in excellent to good yields (99-66%) is reported. This novel metal-catalyzed coupling proceeds under mild conditions (chlorobenzene, 60 °C), exhibits high functional group tolerance, and is insensitive to the electronic and steric effects of the substituents in the reactants.
A new silicon lewis acid for highly enantioselective Mannich reactions of aliphatic ketone-derived hydrazones
Notte, Gregory T.,Leighton, James L.
, p. 6676 - 6677 (2008/12/22)
The first general method for the highly enantioselective Mannich reaction of aliphatic ketimines is reported. A new, second generation chiral silane Lewis acid has been developed that promotes the reaction between ketone-derived hydrazones and silyl ketene acetals, providing the β,β-disubstituted β-amino esters with good enantioselectivity even for the hydrazone derived from 2-butanone (methyl vs ethyl, 91% ee). Several examples are provided, including a reaction with a substituted (propanoate-derived) silyl ketene acetal. Copyright
Catalytic asymmetric reductive amination of ketones via highly enantioselective hydrogenation of the C=N double bond
Burk, Mark J.,Martinez, Jose P.,Feaster, John E.,Cosford, Nick
, p. 4399 - 4428 (2007/10/02)
We describe a convenient, chemoselective asymmetric reductive amination procedure for the conversion of ketones to chiral hydrazines and amines. The key step in the three-step process is enantioselective DuPHOS-Rh-catalyzed hydrogenation of the C=N double bond of N-acylhydrazones. Detailed optimization studies revealed the effect of solvent, temperature, and the N- acyl group on the enantioselectivity and catalytic efficiency of the reaction. The reduction products, N-acylhydrazines, were converted to hydrazines or amines through hydrolysis or treatment with samarium(II) iodide, respectively.
