A novel and facile synthesis of 3-(2-benzofuroyl)- and 3,6-bis(2-benzofuroyl)carbazole derivatives

• Wentao Gao,
• Meiru Zheng and
• Yang Li

Beilstein J. Org. Chem. 2011, 7, 1533–1540, doi:10.3762/bjoc.7.180

• large number of organic reactions can be carried out with a higher yield, in shorter reaction time and under milder conditions with the aid of ultrasonication. For example, Palimkar et al. [52] ever reported a facile ultrasound-promoted synthesis of benzo[b]furan derivatives. Accordingly, the

• observed that if the ultrasound-assisted Rap–Stoermer reaction was performed in the absence of PEG-400, the desired products were not obtained in appreciable yields, which indicates that both the catalysis by PEG-400 and the ultrasonication together promoted this reaction. To establish the generality and

• apparatus. Ultrasonication was performed in a KQ-250B medical ultrasound cleaner at a frequency of 40 KHz and output power of 250 W (Built-in heating 30–80 °C, thermostatically adjustable). 1H NMR and 13C NMR spectra were recorded on a Bruker AVANCE NMR spectrometer with CDCl3 or DMSO-d6 as the solvent. The

First synthesis of 2-(benzofuran-2-yl)-6,7-methylene dioxyquinoline-3-carboxylic acid derivatives

• Wentao Gao,
• Jia Liu,
• Yun Jiang and
• Yang Li

Beilstein J. Org. Chem. 2011, 7, 210–217, doi:10.3762/bjoc.7.28

• . Biological activity of the synthesized compounds remains to be studied. Experimental Melting points (uncorrected) were determined with a WRS-1B melting point apparatus and are uncorrected. Ultrasonication was performed in a KQ-250B medical ultrasound cleaner with a frequency of 40 KHz and output power of

Miniemulsion polymerization as a versatile tool for the synthesis of functionalized polymers

• Daniel Crespy and
• Katharina Landfester

Beilstein J. Org. Chem. 2010, 6, 1132–1148, doi:10.3762/bjoc.6.130

• polymerization. Therefore it is difficult to know if the experiment represented a “true” miniemulsion polymerization process. A similar process was employed but with homogenization of catalyst/hexadecane/toluene, which was performed with either ultrasonication or high-pressure homogenizer in order to obtain a

Symmetrical and unsymmetrical α,ω-nucleobase amide-conjugated systems

• Sławomir Boncel,
• Maciej Mączka,
• Krzysztof K. K. Koziol,
• Radosław Motyka and
• Krzysztof Z. Walczak

Beilstein J. Org. Chem. 2010, 6, No. 34, doi:10.3762/bjoc.6.34

• prepared by ultrasonication were subjected to slow vaporisation at −20 °C. Microcrystalline assemblies were grown directly on copper grids for TEM analyses. This procedure of growth accompanied by careful investigations revealed that thymine- (A, B) and 5-nitrouracil-based (C) bolaamphiphiles derived from