Cu(OTf)<sub>2</sub>-Catalyzed Pummerer Coupling of β-Ketosulfoxides
作者:Regev Parnes、Hagai Reiss、Doron Pappo
DOI:10.1021/acs.joc.7b02708
日期:2018.1.19
The copper(II) trifluoromethanesulfonate-catalyzed Pummerer reaction of β-ketosulfoxides with 1,3-dicarbonyl compounds or π-nucleophiles such as phenols, arenes, and tetraallylsilane is reported. The mild conditions provide an efficient entry to a novel class of polysubstituted 3-alkylthiofuran and polysubstituted 3-thiobenzofuran heterocycles from readily available materials.
A New Facile Approach to the Synthesis of 3-Methylthio-Substituted Furans, Pyrroles, Thiophenes, and Related Derivatives
作者:Guodong Yin、Zihua Wang、Aihua Chen、Meng Gao、Anxin Wu、Yuanjiang Pan
DOI:10.1021/jo702585s
日期:2008.5.1
the Paal−Knorr furansynthesis. Meanwhile, 4-bromo-3-methylthio 2,5-diaryl furan 10 is obtained either by the treatment of furan 7 with molecular bromine or by the treatment of diketone 3 with 30% hydrogen bromide in acetic acid solution in one pot. Removal of the methylthio group is accomplished by the treatment of 7 with Raney Ni in ethanol, which affords the diaryl-substituted furan 11 in excellent
A newfluorescentchemosensorbasedupon 2,5-diphenylfuran and 8-hydroxyquinoline was designed and synthesized. Its structure was confirmed by single crystal X-ray diffraction and its photophysical properties were studied by absorption and fluorescence spectra. This compound can be used to determine Fe3+ ion with high selectivity among a series of cations in aqueous DMF. This sensor forms a 1:1 complex
A Highly Selective Fluorescent Sensor for Al<sup>3+</sup> based on an Aza-18-Crown-6 Derivative
作者:Song Jingjing、Hu Yang、Zhao Fang、Hu Shengli
DOI:10.3184/174751915x14425101743684
日期:2015.10
A new fluorescent sensor derived from 2,5-diphenyl-furan and aza-18-crown-6 has been synthesised. It can selectively bind Al3+ in aqeuous ethanol solution with fluorescence enhancement.
A tandem sulfenylation/cyclization method to build the scaffold of methylthiofurans with homopropargylicalcohols and DMTSM has been developed. The DMTSM is employed as methylthiolation agent for the CS bond formation in this transformation. Various substituted homopropargylicalcohols proceed successfully and the corresponding 3-methylthiofurans are afforded in ideal yields under mild conditions.