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。
Niobium Pentachloride Mediated Direct Bradsher-Type Reaction: A Rapid and Efficient Strategy to Synthesize Novel Substituted 9-Anthraldehydes
作者:Paulo M. Donate、Giovanni S. Baviera
DOI:10.1055/s-0041-1738445
日期:2023.10
Dichloromethyl methyl ether in the presence of niobium pentachloride and activated triarylmethanes leads to an efficient, mild, and rapid one-pot synthesis of several 9-anthraldehyde derivatives via a direct Bradsher-type reaction. This practical methodology offers several advantages, such as a broad substrate scope, simple workup process, and excellent yields.