N-Heterocyclic Carbene-Catalyzed Construction of 1,3,5-Trisubstituted Benzenes from Bromoenals and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Song Ye
DOI:10.1021/acs.orglett.6b03306
日期:2016.12.16
A direct and efficient approach to 1,3,5-trisubstituted benzenes has been developed via N-heterocycliccarbene-catalyzed [2 + 4] annulation of α-bromoenals and α-cyano-β-methylenones. The reaction worked well for both aryl- and alkylenones.
DBU-Mediated Construction of 1,3,5-Trisubstituted Benzenes via Annulation of α,β-Unsaturated Carboxylic Acids and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Zhao-Fei Zhang、Zi-Hao Xia、You-Feng Han、Song Ye
DOI:10.1021/acs.joc.8b01740
日期:2018.10.19
A DBU-mediated synthesis of 1,3,5-trisubstituted benzenes was developed via the [2 + 4] annulation of in situ activated α,β-unsaturatedcarboxylic acids and α-cyano-β-methylenones. The dual role of DBU as Brønsted base and nucleophilic Lewis base is the key for the success of the reaction.
Synthesis of Asymmetric Triarylbenzenes by Using SOCl<sub>2</sub>-C<sub>2</sub>H<sub>5</sub>OH Reagent
作者:Zhiguo Hu、Jun Liu、Gongan Li、Zhibing Dong、Wei Li
DOI:10.1002/jccs.200400089
日期:2004.6
A simple and efficient method for synthesis of asymmetric branched functionalized triarylbenzenes is presented. The dypnone reacting with different substituted acetophenones, corresponding asymmetric 1,3,5-triarylbenzenes were obtained in the presence of catalytic amounts of sulfurous oxychloride in anhydrous ethanol.
Assembly of unsymmetrical 1,3,5-triarylbenzenes <i>via</i> tandem reaction of β-arylethenesulfonyl fluorides and α-cyano-β-methylenones
作者:Fang Zhang、Yi An、Jichang Liu、Guangfen Du、Zhihua Cai、Lin He
DOI:10.1039/d2nj01549h
日期:——
A transition-metal-free method has been proposed for the synthesis of unsymmetrical 1,3,5-triarylbenzenes via a tandem Diels–Alder cycloaddition/SuFEx/elimination process.