Baohua Huang

Blanc Reaction of Aromatic Compounds Catalyzed by Ionic Liquids

Ionic liquids have been used as catalysts for Blanc reaction of toluene. The effects of reaction temperature, reaction time and dosage of the ionic liquid catalyst have been investigated, and the catalytic performance of different ionic liquid catalysts for toluene chloromethylation was also studied. The reaction was found to proceed under mild conditions with excellent conversion (up to 90%) in the absence of Lewis acids. The ionic liquids could be recycled and reused without loss of their catalytic activities.

Enzymatic production of natural sweetener trilobatin from citrus flavanone naringin using immobilised α-l-rhamnosidase as the catalyst

1 School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China 2 Goldenpomelo Biotechnology Co. Ltd., Meizhou 514021, China 3 School of Chemical and Environmental Engineering, International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529020, China 4 Centre for Education in Environmental Sustainability, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong, China

5-Hydr­oxy-1-methyl-3,4-dihydro-2H-pyrrolium hydrogensulfate

The title compound, C5H10NO+·HSO4 −, has been synthesized by reaction of 1-methylpyrrolidin-2-one with H2SO4 in a 1:1 molar ratio. The substituted pyrrolium ring adopts an envelope conformation. The hydrogensulfate anions form infinite helical chains parallel to the a axis via strong O—H⋯O hydrogen bonds. The pyrrolium cations are pendant from the chains. These cations are the hydrogen donors in the strong O—H⋯O hydrogen bonds to the hydrogensulfates. In addition, there are weak C—H⋯O hydrogen bonds in the structure.