含有 C(sp3 )-+ P 键的有机鏻盐是有机合成中用于构建 CC 双键的最常用试剂之一。然而,它们用作 C 选择性亲电基团的情况很少见。在这里,我们探索了一种有效且通用的无过渡金属方法,用于顺序化学和区域选择性 CH 和 C(sp3 )-+ P 键功能化。在本研究中,CH 烷基化导致二苯甲基三芳基鏻盐的合成是通过简单和市售起始材料的一锅四组分交叉偶联反应实现的。通过对苄基 C(sp3 )-+ PPh3 基团进行化学选择性后官能化以实现胺化、硫醇化和芳基化,证明了所得鏻盐结构单元的实用性。这样,二苯甲基胺、二苯甲基硫醚、和三芳基甲烷是许多药物和农用化学品中存在的结构基序,很容易获得。其中包括仅用两到三个步骤从简单材料合成两种抗癌剂。此外,还开发了使用二苯甲基鏻盐对生物活性药物进行后期功能化的协议。这种新方法应该为学术和药物研究中的应用提供新的转变。
Abstract A facile and environmentally-benign protocol has been developed for the synthesis of triarylmethanes (TAMs) from the reaction of different arenes and aldehydes in the presence of silicasulfuricacid (SSA) as a heterogeneous and reusable catalyst undersolvent-free conditions. Easy work-up, short reaction times, high yields, high selectivity, mild and green conditions are other salient features
Ultrasound-Assisted eco-friendly synthesis of triarylmethanes catalyzed by silica sulfuric acid
作者:I. Mohammadpoor-Baltork、M. Moghadam、S. Tangestaninejad、V. Mirkhani、K. Mohammadiannejad-Abbasabadi、M. A. Zolfigol
DOI:10.1007/bf03245914
日期:2011.9
An efficient and eco-friendly synthesis of triarylmethanes by the reaction of arenes with aldehydes in the presence of silicasulfuricacid as a heterogeneous and reusable catalyst under ultrasonic irradiation is reported. The advantages of this protocol are the use of green solvents, inexpensive catalyst, commercially available precursors, reusability of SSA, simple work-up, high yields and short
H3PW12O40-Catalysed Alkylation of Arenes and Diveratrylmethanes: Convenient Routes to Triarylmethanes and to Symmetrical and Unsymmetrical 9,10-Diaryl-2,3,6,7-tetramethoxyanthracenes
作者:Iraj Mohammadpoor-Baltork、Majid Moghadam、Shahram Tangestaninejad、Valiollah Mirkhani、Kazem Mohammadiannejad-Abbasabadi、Hamid R. Khavasi
DOI:10.1002/ejoc.201001267
日期:2011.3
preparation of symmetrical9,10-diaryl-2,3,6,7-tetramethoxyanthracenes. The conversion of aldehydes into their corresponding acylals in the presence of H 3 PW 12 O 40 and the one-pot reactions of diveratrylmethanes with these acylals were also used for the synthesis of symmetrical and unsymmetrical9,10-diaryl-2,3,6,7-tetramethoxyanthracenes.
已经开发了一种在热和微波辐射条件下,在 H 3 PW 12 O 40 作为可重复使用的催化剂存在下,通过醛和芳烃之间的无溶剂反应合成三芳基甲烷和二呋喃基芳基甲烷的有效方法。H 3 PW 12 O 40 催化的藜芦醇和醛之间的一锅连续傅-克反应也被用作制备对称 9,10-二芳基-2,3,6,7-四甲氧基蒽的便捷方案。在 H 3 PW 12 O 40 存在下醛类转化为相应的酰基醛以及二重芳基甲烷与这些酰基的一锅反应也用于合成对称和不对称的 9,10-二芳基-2,3,6 ,7-四甲氧基蒽。
Development of Transition‐Metal‐Free Lewis Acid‐Initiated Double Arylation of Aldehyde: A Facile Approach Towards the Total Synthesis of Anti‐Breast‐Cancer Agent
reported. This protocol features mild conditions, feedstock reagents, very low catalyst loading, remarkable scope (>85 examples) and gram-scale synthesis (TON=475). Moreover, several unexplored biologically active molecules for example, the antiparkinson agent, vibrindole A, turbomycin B and, total synthesis of an anti-breast-cancer agent is demonstrated. Control experiments and mechanistic studies
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。
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 [