Efficient Thiophene Synthesis Mediated by 1,3-Bis(carboxymethyl)imidazolium Chloride: C-C and C-S Bond Formation
作者:Patricia Gisbert、Isidro M. Pastor
DOI:10.1002/ejoc.202000484
日期:2020.8.2
This work was financially supported by the University of Alicante (VIGROB-173, VIGROB-285, VIGROB-316FI and UAUSTI19-21), the Spanish Ministerio de Economia y Competitividad (CTQ2015-66624-P, CTQ2017-88171-P), the Spanish Ministerio de Ciencia, Innovacion y Universidades (PGC2018-096616-B-I00) and the Generalitat Valenciana (AICO/2017/007). P. G. thanks the ISO (University of Alicante) for a grant
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.
Sulfurative self-condensation of ketones and elemental sulfur: a three-component access to thiophenes catalyzed by aniline acid–base conjugate pairs
作者:Thanh Binh Nguyen、Pascal Retailleau
DOI:10.1039/c7gc03437g
日期:——
A sulfurative self-condensation method for constructing thiophenes 2 by a reaction between ketones 1 and elemental sulfur is reported. This reaction, which is catalyzed by anilines and their salts with strong acids, starts from readily available and inexpensive materials, and releases only water as a by-product.
Synthesis and properties of z-1,3-bis-(aryl)-4-bromo-2-buten-1-ones
作者:L. M. Potikha、A. R. Turelik、V. A. Kovtunenko
DOI:10.1007/s10593-010-0405-5
日期:2009.10
Bromination of 1,3-bis(aryl)-2-buten-1-ones by N-bromosuccinimide in anhydrous carbon tetrachloride gives Z-1,3-bis(aryl)-4-bromo-2-buten-1-ones. The effect of the nature of substituent in the benzene ring on the course of a reaction with nucleophiles has been studied. Heating an alcohol solution of these ketones (Ar = 4-MeOC6H4, 4-ClC6H4) in the presence of acid or in the presence of base (Ar = Ph)
N-溴琥珀酰亚胺在无水四氯化碳中溴化1,3-双(芳基)-2-丁烯-1-酮,得到Z-1,3-双(芳基)-4-溴-2-丁烯-1-酮。已经研究了苯环中取代基的性质对与亲核试剂反应过程的影响。在酸存在下或在碱存在下(Ar = Ph)加热这些酮(Ar = 4-MeOC 6 H 4,4 -ClC 6 H 4)的醇溶液,得到2,4-双(芳基)呋喃。用硫代乙酰胺处理1,3-双(芳基)-4-溴-2-丁烯-1-酮得到2,4-双(芳基)噻吩。H 2 O 2对卤素取代的二氢吡啶酮的氧化用/ NaOH得到(3-溴甲基-3-芳基-2-环氧乙烷基)(芳基)甲烷酮。取决于试剂的结构,卤素取代的二氢吡啶酮与芳基肼的反应产生1,3,5-三芳基-1,6-二氢哒嗪或1,3,5-三芳基吡啶并鎓溴化物。
Thiocarbonyls. VII. Studies on p-Substituted Acetophenones<sup>1</sup>