Synthesis of hydrazone derivatives of benzofuran and their antibacterial and antifungal activity
摘要:
A series of benzofuran hydrazones 6a-6n were synthesized from benzofuran aldehyde and substituted aromatic hydrazides 5a-5n. Structures of all compounds were confimed by IR, H-1 and C-13 NMR, and Mass spectral data. These compounds were evaluated for their antibacterial activity against gram-negative bacteria (Escherichia coli, -ve), gram-positive bacteria (Bacillus Subtillis, +ve), and antifungal activity against Candida albicans. All compounds demonstrated considerable activity against bacteria and fungi.
The reaction of phenols with benzyltrimethylammonium dichloroiodate(1–) in dichloromethane-methanol in the presence of CaCO3 or NaHCO3 for several hours at room temperature gave iodophenols in good yields.
Palladium catalyzed ring opening of furans as a route to α,β-unsaturated aldehydes
作者:Laurent El Kaïm、Laurence Grimaud、Simon Wagschal
DOI:10.1039/c0cc04164e
日期:——
Furans may be ring opened via pallado-catalyzed reactionsleading to alpha,beta-unsaturated aldehydes and ketones tethered to indole and isoquinoline moieties. Besides their synthetic interest, these fragmentations bring interesting elements into the discussion around the reaction mechanisms involved in palladium C-H activations of electron-rich heterocycles.
Palladium-Catalyzed Ring Opening of Aminocyclopropyl Ugi Adducts
作者:Laurent El Kaïm、Laurence Grimaud、Aurélie Dos Santos、Romain Ramozzi
DOI:10.1055/s-0031-1290312
日期:2012.2
The ring opening of aminocyclopropanes triggered by activation with an intramolecular arylpalladium(II) iodide complex is an interesting strategy for the synthesis of nitrogen heterocycles and a valuable Ugi postcondensation-type transformation. Six- and seven-membered-ring cyclic enamines may be obtained. aminocyclopropanes - ring opening - palladium - Ugi - Ugi-Smiles