Gold-Catalyzed Synthesis of Substituted Tetrahydronaphthalenes
作者:Christiane M. Grisé、Louis Barriault
DOI:10.1021/ol062582g
日期:2006.12.1
We report a gold-catalyzed benzannulation of 3-hydroxy-1,5-enynes to generate tetrahydronaphthalenes. This mild process proves to be an effective method to synthesize various metasubstituted aromatic rings in good yields. [reaction: see text]
Gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes: an efficient synthesis of substituted tetrahydronaphthalenes and related compounds
作者:Christiane M. Grisé、Eric M. Rodrigue、Louis Barriault
DOI:10.1016/j.tet.2007.10.084
日期:2008.1
We report a novel gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes to prepare tetrahydronaphthalenes. The reaction is catalyzed by 2.5 mol % Ph3PAuCl and 2.5 mol % AgOTf in dichloromethane. We discovered that this process can be also catalyzed by 1 mol % Ph3PAuCl and 1 mol % TfOH. To the best of our knowledge, this constitutes the first report of an active gold catalyst generated from Au(PPh3)Cl
Site‐Selective (
<i>Z</i>
)‐α‐Borylalkenyl Copper Systems for Nucleophilic Stereodefined Allylic Coupling
作者:Mireia Pujol、Ricardo J. Maza、Oriol Salvado、Jorge J. Carbó、Elena Fernández
DOI:10.1002/anie.202208495
日期:2022.9.12
The energetically preferred formation of (Z)-α-borylalkenyl copper(I) species and the subsequent coupling reaction with allyl bromides allow the exclusive formation of (Z)-skipped dienes. This new methodology is applicable to various 1,1-di(pinacolboryl)alkenes which can be efficiently coupled with different types of allyl halides. The (Z)-skipped dienes with bromide functionality are treated with
铜膦催化系统立体选择性地活化 1,1-二硼基烯烃。 ( Z )-α-硼基链烯基铜(I)物质的能量优先形成以及随后与烯丙基溴的偶联反应允许仅形成( Z )-跳跃二烯。这种新方法适用于各种1,1-二(频哪醇硼基)烯烃,它们可以与不同类型的烯丙基卤化物有效偶联。用 NaO t Bu 处理具有溴化物官能团的 ( Z )-跳过的二烯,以通过烯炔中间体促进环化/芳构化模式。