5-Di(hetero)arylfurans are readilyaccessible in a pseudo five-component reactionvia a Sonogashira-Glaser coupling sequence followed by a superbase-mediated (KOH/DMSO) cyclization in a consecutive one-pot fashion. Besides the straightforward synthesis of natural products and biologically active molecules all representatives are particularly interesting due to their bright blue luminescence with remarkably
Ionic Liquid as Catalyst and Reaction Medium: A Simple and Efficient Procedure for Paal–Knorr Furan Synthesis
作者:Gangqiang Wang、Zhi Guan、Rongchang Tang、Yanhong He
DOI:10.1080/00397910902978049
日期:2010.1.14
The ionicliquid 1-butyl-3-methyl-imidazolium hydrogen sulfate, [bmim]HSO4, efficiently catalyzes Paal–Knorr furan synthesis without any organic solvent. A wide range of aliphatic and aromatic 1,4-diketones easily undergo condensations to form furan derivatives, providing a general and convenient procedure. The Paal–Knorr reaction of ester-substituted 1,4-diketones is first reported. The ionic liquid
Copper(II)-Promoted, One-Pot Conversion of 1-Alkynes with Anhydrides or Primary Amines to the Respective 2,5-Disubstituted Furans or Pyrroles under Microwave Irradiation Conditions
作者:Hyejeong Lee、Yeonhui Yi、Chul-Ho Jun
DOI:10.1002/adsc.201500711
日期:2015.11.16
Furans and pyrroles are prepared from 1-alkynes by using a Cu(II)-promoted, one-pot, microwaveirradiation method. Glaser coupling of 1-alkynes and cyclization of the resulting 1,3-diyne in the presence of an anhydride or a primaryamine results in the formation of the respective 2,5-diaryl- or 2,5-dialkyl-substituted furans and pyrroles.
Synthesis and 13C nmr characterization of some π-excessive heteropolyaromatic compounds
作者:Adriano Carpita、Renzo Rossi、Carlo Alberto Veracini
DOI:10.1016/s0040-4020(01)96555-x
日期:1985.1
Several π-excessive heteropolyaromatic compounds, which contain furan and thiophen ring and are possible antifungal agents, have been synthesized in good yields according to two general methods. The first method has been used to prepare compounds possessing thiophens linked by their 2- and 5-positions, such as the ter-aryls 2b, 2d and 2a. Two precursors of these compounds have been obtained either
Synthesis of Mixed Thiophene/Furan Oligomers by Stille Coupling
作者:A. Hucke、M. P. Cava
DOI:10.1021/jo981159l
日期:1998.10.1
A series of mixed thiophene/furanoligomers have been synthesized via organometallic Stille coupling. In some cases, beside cross-coupling products, symmetrical coupling products were isolated. Oligomers consisting of up to 11 rings were obtained. Attempts to prepare macrocycles with 10 thiophene and furan units were not successful.