B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> catalysed reduction of para-quinone methides and fuchsones to access unsymmetrical diaryl- and triarylmethanes: elaboration to beclobrate
作者:Sriram Mahesh、Ramasamy Vijaya Anand
DOI:10.1039/c7ob02007d
日期:——
A mild and efficient method for the synthesis of unsymmetrical diaryl- and triarylmethanes through a B(C6F5)3 catalyzed reduction of para-quinone methides and fuchsones respectively, using the Hantzsch ester as a reducing source has been developed. Detailed mechanistic investigations revealed that the reaction actually proceeds through a Lewis acid–base pair complex derived from B(C6F5)3 and the Hantzsch
已开发出一种温和有效的方法,该方法通过使用Hantzsch酯作为还原源,通过B(C 6 F 5)3分别催化对苯醌甲基化物和丁二酮的还原反应,合成不对称的二芳基甲烷和三芳基甲烷。详细的机械研究表明,该反应实际上是通过衍生自B(C 6 F 5)3和汉茨(Hantzsch)酯的路易斯酸-碱对络合物进行的。
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。
Ink composition containing a photo-acid and a photo-base generator and processes using them
申请人:FUJIFILM Corporation
公开号:EP1702962B1
公开(公告)日:2008-12-24
Ink composition and inkjet recording method
申请人:Fujifilm Corporation
公开号:EP2169022B1
公开(公告)日:2011-11-16
Uranyl-catalyzed hydrosilylation of <i>para</i>-quinone methides: access to diarylmethane derivatives
作者:Jipan Yu、Siyu Chen、Kang Liu、Liyong Yuan、Lei Mei、Zhifang Chai、Weiqun Shi
DOI:10.1039/d0ob02455d
日期:——
An efficient and convenient uranyl-catalyzed reductive hydrosilation reaction of para-quinone methides was developed by employing silane as the reductant.