报道了一种用于合成对称/不对称三芳基甲烷和二芳基甲烷的无过渡金属方法。该协议具有温和的条件、原料试剂、极低的催化剂负载、显着的范围(>85 个示例)和克级合成(TON=475)。此外,还展示了几种未开发的生物活性分子,例如抗帕金森剂、vibrindole A、涡轮霉素 B 和抗乳腺癌剂的全合成。还进行了对照实验和机理研究,以检测反应中间体和反应进程,以阐明可能的反应机理。
Efficient Condensation Reactions of Electron-Rich Arenes with Aldehydes and Enals Promoted by Gold(III) Chloride: Practical Synthesis of Triaryl- and Triheteroarylmethanes and Related Compounds
作者:Vijay Nair、N. Vidya、K. Abhilash
DOI:10.1055/s-2006-950209
日期:2006.11
Electron-rich arenes undergo gold(III) catalyzed condensation reactions with aldehydes and enals to afford bis- and tris-addition products, respectively, in high yields.
富电子芳烃与醛和烯醛发生金 (III) 催化缩合反应,分别以高产率提供双加成和三加成产物。
Metal- and solvent-free synthesis of aniline- and phenol-based triarylmethanes<i>via</i>Brönsted acidic ionic liquid catalyzed Friedel-Crafts reaction
A beneficial, scalable and efficient methodology for the synthesis of aniline-based triarylmethanes has been established through the double Friedel-Crafts reaction of commercial aldehydes and primary, secondary or tertiary anilines using Brönstedacidicionicliquid as a powerful catalyst, namely [bsmim][NTf2]. This protocol was successfully performed under metal- and solvent-free conditions with a
Practical Synthesis of Triaryl- and Triheteroarylmethanes by Reaction of Aldehydes and Activated Arenes Promoted by Gold(III) Chloride
作者:Vijay Nair、K. G. Abhilash、N. Vidya
DOI:10.1021/ol052423h
日期:2005.12.1
[reaction: see text] Electron-rich arenes condense efficiently with various aldehydes under the influence of AuCl3, thus opening up a practical route to triarylmethanes, which have important applications. The mild conditions employed are especially noteworthy.
Iodine is shown to be an efficient catalyst for the Friedel–Craftsalkylation of arenes with a wide variety of aldehydes in toluene under ‘open-flask’ and mild conditions. In the presence of 10 mol % of iodine, the reaction of arenes with aromaticaldehydes gives the corresponding triarylmethane derivatives (TRAMs), regioselectively, in good to excellent yields. On the other hand, a series of diarylalkane
SnCl2 insertion into Ir–Cl and Rh–Cl bonds: Synthesis, characterization and catalytic activity of three-legged piano-stool trichlorostannyl iridium and rhodium complexes
作者:Arnab Kumar Maity、Manish Bhattacharjee、Sujit Roy
DOI:10.1016/j.jorganchem.2014.06.011
日期:2014.10
[Cp*Ir(SnCl3)2SnCl2(H2O)2}] (1) and [Cp*Ir(SnCl3)3][NH3tBu] (3), respectively. Similarities in NMR data for complexes 1 and 3 suggested that complex 1 converts to anionic [Cp*Ir(SnCl3)3] species in solution via rapid chloride exchange. Similarly, insertion reaction of SnCl2 with [Cp*Ir(PPh3)Cl2] and [Cp*Rh(PPh3)Cl2] afforded single insertion complex [Cp*Ir(PPh3)(SnCl3)Cl] (2) and double insertion complex [