One-pot two step synthesis of unsymmetrically substituted indenes from 3,4-diarylbutadiene sulfones
作者:Olga V. Shurupova、Grigorii K. Sterligov、Maria A. Rasskazova、Egor A. Drokin、Antonina N. Lysenko、Sergey A. Rzhevskiy、Lidiya I. Minaeva、Maxim A. Topchiy、Andrey F. Asachenko
DOI:10.1016/j.mencom.2022.07.006
日期:2022.7
A new one-pot two step synthesis of unsymmetrically substituted indenes from available 3,4-diarylbutadiene sulfones involves SO2 thermal extrusion followed by acid- catalyzed cyclization of the diene formed, the cyclization proceeding selectively at the more electron-rich aryl rings. The procedure is efficient for substrates bearing donor, acceptor, as well as bulky substituents.
由可用的 3,4-二芳基丁二烯砜合成不对称取代的茚的新一锅两步合成涉及 SO 2热挤出,然后对形成的二烯进行酸催化环化,环化选择性地在更富电子的芳环上进行。该程序对于带有供体、受体以及大取代基的底物是有效的。