在这里,我们描述了由 Re 2 O 7 /HReO 4介导的高效分子内加氢芳基化。不同电子特性的苯乙烯衍生物已被激活,以实现具有挑战性的分子内加氢芳基化,从而轻松获得各种取代的 1-芳基四氢化萘结构。该方法具有反应条件温和、底物范围广、化学收率高、原子经济性100%等特点。iso CA-4 类似物的有效全合成例证了该方法的潜在合成应用。
Remote sp3 C–H Amination of Alkenes with Nitroarenes
作者:Jichao Xiao、Yuli He、Feng Ye、Shaolin Zhu
DOI:10.1016/j.chempr.2018.04.008
日期:2018.7
Direct installation of a functional group at remote, unfunctionalized sites in an alkyl chain is a synthetically valuable but rarely reported process. The remote relay hydroarylamination of distal and proximal olefins, and of olefin isomeric mixtures, has been achieved through NiH-catalyzed alkene isomerization and sequential reductive hydroarylamination with nitroarenes. This provides an attractive
Transition-Metal-Free Sulfuration/Annulation of Alkenes: Economical Access to Thiophenes Enabled by the Cleavage of Multiple C–H Bonds
作者:Liang Chen、Hao Min、Weilan Zeng、Xiaoming Zhu、Yun Liang、Guobo Deng、Yuan Yang
DOI:10.1021/acs.orglett.8b03078
日期:2018.12.7
and transition-metal-free strategy for the synthesis of thiophenes from substituted buta-1-enes with potassium sulfide has been presented. The reaction achieves double C–Sbondformations via cleavage of multiple C–H bonds and provides an efficientapproach to access various functionalized thiophenes. Moreover, the strategy can also be used for the synthesis of thiophenes from 1,4-diaryl-1,3-dienes.
A one-pot stereoselective synthesis of trans-1-aryl-2-aminotetralins from 2-arylethyl styrenes
作者:Saumen Hajra、Biswajit Maji、Debarshi Sinha、Sukanta Bar
DOI:10.1016/j.tetlet.2008.04.056
日期:2008.6
An efficient stereoselective synthesis of trans-1-aryl-2-aminotetralins has been achieved via Cu(OTf)(2) catalyzed one-pot aziridination and regioselective intramolecular arylation of in situ generated aziridines from 2-arylethyl styrenes and PhINSO(2)(4-NO(2)C(6)H(4)) [PhINNs]. Reaction of a mixture of E/Z-styrenes (<= 85:15) provided trans-N-protected-1-aryl-2-aminotetralins with high diastereoselectivity (dr > 95:5), which are important synthons for many artificial pharmaceuticals. (C) 2008 Elsevier Ltd. All rights reserved.
A Catalytic and Enantioselective Synthesis of<i>trans-</i>2-Amino-1- aryltetralins
作者:Saumen Hajra、Biswajit Maji、Dipakranjan Mal
DOI:10.1002/adsc.200800603
日期:2009.4
Abstractmagnified imageThe bis‐oxazoline‐copper complex‐catalyzed aziridination of alkenes followed by an intramolecular Friedel–Crafts alkylation of the tethered andin situgenerated aziridine provides a one‐pot, general and efficient method for the synthesis oftrans‐2‐amino‐1‐aryltetralins from a mixture of 2‐ arylethylstyrenes (E/Z≤85:15) with excellent dia‐ stereo‐ (dr>99:1) and enantioselectivities (up to 92%ee).