A Cu-catalysed synthesis of substituted 3-methyleneisoindolin-1-one
作者:Anupal Gogoi、Srimanta Guin、Saroj K. Rout、Ganesh Majji、Bhisma K. Patel
DOI:10.1039/c4ra12782j
日期:——
A Cu-catalysed synthesis of substituted isoindolin-1-one has been achieved via a decarboxylative alkynylation–heteroannulation path.
通过脱羧炔基化-杂环化途径,已经实现了一种取代异吲哚啉-1-酮的Cu催化合成。
Synthesis and antibacterial activity of 5-methylphenanthridium derivatives as FtsZ inhibitors
作者:Fang Liu、Henrietta Venter、Fangchao Bi、Susan J. Semple、Jingru Liu、Chaobin Jin、Shutao Ma
DOI:10.1016/j.bmcl.2017.06.005
日期:2017.8
5-Methylphenanthridium derivatives were designed, synthesized and evaluated for their in vitro antibacterialactivity and cell division inhibitory activity against various Gram-positive and -negative bacteria. Among them, compounds 5A2, 5B1, 5B2, 5B3, 5C1 and 5C2 displayed the best on-target antibacterialactivity with an MIC value of 4 µg/mL against B. subtilis ATCC9372 and S. pyogenes PS, showing
Practical Synthesis of Phenanthridinones by Palladium-Catalyzed One-Pot C-C and C-N Coupling Reaction: Extending the Substrate Scope to<i>o</i>-Chlorobenzamides
domino reaction proceeds through a sequential C–C and C–N bond-formation process in one pot. This protocol exhibits broad substratescope and affords a series of phenanthridinones in up to 93 % yield. Importantly, the protocol could also be applied for the less reactive o-chlorobenzamides. The approach constitutes the first example of the synthesis of phenanthridinones from this kind of substrate. Moreover
Palladium-Catalyzed CC Coupling of Aryl Halides with Isocyanides: An Alternative Method for the Stereoselective Synthesis of (3E)-(Imino)isoindolin-1-ones and (3E)-(Imino)thiaisoindoline 1,1-Dioxides
transformation successfully extends itsapplication for the synthesis of phenanthridines and dibenzooxazepines. This new synthetic protocol not only extends the application platform for palladium-catalyzed CC coupling of aryl halides with isocyanides, but also opens atom-economic and step-economic synthetic routes for nitrogen-containing heterocyclic compounds with wide functional group compatibility.
Microwave-promoted efficient synthesis of a (Z)-3-methyleneisoindolin-1-one library from 2-bromobenzamides and terminal alkynes using Cu(OAc)2•H2O/DBU is described. Various benzamide substituents, ring substitutions, including heteroaryl, aryl acetylenes and aliphatic alkynes, could be applied to afford the desired products in good to moderate yield with high stereoselectivity. It is noteworthy that DBU maybe play a dual role as not only the base, but also as a ligand for copper. The reaction is catalyzed by the complex of Cu(OAc)2•H2O and DBU without other additives.