Synthesis of Indenes via Brønsted Acid Catalyzed Cyclization of Diaryl- and Alkyl Aryl-1,3-dienes
作者:Dahan Eom、Sangjune Park、Youngchul Park、Taekyu Ryu、Phil Ho Lee
DOI:10.1021/ol302271w
日期:2012.11.2
Substituted indenes can be synthesized via the Brønsted acid catalyzed cyclization of diaryl- and alkyl aryl-1,3-dienes. In this approach, treatment of symmetric or unsymmetric diaryl- and alkyl aryl-1,3-dienes with a catalytic amount of trifluoromethanesulfonic acid gives a variety of indene derivatives in good to excellent yields under mild conditions.
Facile synthesis of dibranched conjugated dienes via palladium-catalyzed oxidative coupling of N-tosylhydrazones
作者:Huanfeng Jiang、Li He、Xianwei Li、Huoji Chen、Wanqing Wu、Wei Fu
DOI:10.1039/c3cc43593h
日期:——
developed. This process features readily available starting materials and mild reaction conditions. Further transformations of the obtained dibranched 1,3-dienes, through Diels-Alder reactions and indene synthesis, are also demonstrated, which reveal their great potential for synthetic utility.
A Cyclodehydration Synthesis of 2-Aryl-3-methylindenes<sup>1a,b</sup>
作者:Ned D. Heindel、Sally McNeill Lemke、William A. Mosher
DOI:10.1021/jo01346a508
日期:1966.8
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 unsymmetricallysubstituted 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。