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。
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
Friedel-Crafts Alkylation of Arenes Catalyzed by Ion-Exchange Resin Nanoparticles: An Expedient Synthesis of Triarylmethanes
作者:B. V. Subba Reddy、A. Venkateswarlu、B. Sridevi、Salem S. Aldeyab、Ajayan Vinu
DOI:10.1166/jnn.2015.10671
日期:2015.9.1
Friedel-Crafts alkylation of electron-rich arenes with aldehydes has been achieved in the presence of an active and selective Amberlyst-15 (R) catalyst at the reaction temperature of 60 degrees C in solvent-free conditions. The catalyst exhibits a very high activity and offers the corresponding triarylmethanes in excellent yields with a high selectivity. The use of highly reactive and selective Annberlyist-15 (R) makes this procedure simple, convenient, cost-effective, practical and environmentally friendly. This method provides an easy access to triarylmethanes in a single step using a readily available acidic ionic resin, which is a stable and easy to separate from the reaction mixture by a simple filtration technique.