Novel and highly efficient one pot protocol for the synthesis of diversely functionalized triarylmethanes
作者:B. Madhu Babu、Pramod B. Thakur、Vikas M. Bangade、H.M. Meshram
DOI:10.1016/j.tetlet.2014.11.139
日期:2015.2
efficient, convenient, and novel one pot approach is described for the synthesis of triarylmethanes by in situ oxidation of benzylalcohols followed by the Friedel–Crafts alkylation of di/trimethoxybenzenes in the presence of BF3·OEt2. The generality of the present method is strengthened by screening a variety of aromatic, aliphatic, and heteroaromatic alcohols with methoxy arenes. Shorter reaction time
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。
Friedel−Crafts Arylation Reactions of <i>N</i>-Sulfonyl Aldimines or Sulfonamidesulfones with Electron-Rich Arenes Catalyzed by FeCl<sub>3</sub>·6H<sub>2</sub>O: Synthesis of Triarylmethanes and Bis-heteroarylarylmethanes
作者:Ponnaboina Thirupathi、Sung Soo Kim
DOI:10.1021/jo1010137
日期:2010.8.6
The FeCl3 center dot 6H(2)O-catalyzed Friedel-Crafts arylation reactions of N-sulfonyl aldimines or sulfonamidesulfones with electron-rich arenes and heteroarenes, which lead to the formation of triarylmethanes and bis-heteroarylarylmethanes, are developed. The use of mild reaction conditions, low catalytic loading, high yield, and single step synthesis are the advantages of the present procedure.