Cooperative Indium(III)/Silver(I) System for Oxidative Coupling/Annulation of 1,3-Dicarbonyls and Styrenes: Construction of Five-Membered Heterocycles
作者:Tae Yun Ko、So Won Youn
DOI:10.1002/adsc.201600280
日期:2016.6.16
A cooperative indium(III)/silver(I) system for the synthesis of various five‐membered heterocycles, including dihydrofurans, pyrroles, spirolactones, and spiroiminolactones, through the sequential oxidative coupling/annulation reaction of 1,3‐dicarbonyl compounds with styrenes has been developed. Four different heterocyclic systems were successfully synthesized depending on the substitution pattern
nBu4NI-Catalyzed oxidative imidation of ketones and imides for the synthesis of alpha-amino ketones were realized for the first time. The methodology is characterized by its wide substrate scope even for acetone with readily available phthalimide, saccharin and succinimide, which opens a new pathway for direct imidation of ketones.
Abstract Catalyzed by samarium triiodide (SmI3), substitution of acyl with N‐acylbenzotriazoles for acetyl in acetoacetic esters and acetylacetone proceeds smoothly under neutral conditions in open air, affording the corresponding β‐keto esters and β‐diketones in good yields.
Abstract Some new organotin(IV) complexes of the type R2Sn[OC(R′):CH(CH3)C:NR″O] (R=CH3, C4H9, C6H5; R′=CH3, C6H5; and R″=(CH2)2, (CH2)3) have been synthesized by the reactions of diorganotin dichloride with the sodium salt of the corresponding bifunctional tridentate Schiff base ligands in unimolar ratio in refluxing tetrahydrofuran (THF). All these compounds have been characterized by elemental analyses
Alkyl chain length effect on construction of copper(II) complexes with tridentate Schiff base ligand and DNA interaction
作者:Rasoul Vafazadeh、Fariba Jafari、Mohammad Mehdi Heidari、Anthony C. Willis
DOI:10.1080/00958972.2016.1163547
日期:2016.4.17
deprotonation of the enolic OH groups. The copper(II) centers are five-coordinate with a NO4 donor set from the ligands. The coordination geometry around each copper ion is essentially square pyramidal with one nitrogen and two oxygens from one ligand and two oxygens of adjacent ligands from the next unit of the cubane. In dinuclear 2, H2L2 has chelating and bridging modes after double deprotonation of the