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Dr. Yasumasa Takenaka, Dr. Takahiro Kiyosu, Dr. Goro Mori, Dr. Jun-Chul Choi, Dr. Norihisa Fukaya, Prof. Toshiyasu Sakakura and Prof. Hiroyuki Yasuda Synthesis of Cyclic Sulfites from Epoxides and Sulfur Dioxide with Silica-Immobilized Homogeneous Catalysts ChemSusChem 5

Version of Record online: 1 DEC 2011 | DOI: 10.1002/cssc.201100492

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Immobilized for crimes of pyrolysis: Quaternary ammonium- and amino-functionalized silica catalysts promote the cycloaddition of sulfur dioxide to epoxides to produce cyclic sulfites in high yields (79–96 %) that are comparable to those with the homogeneous catalysts. Separation of the functionalized silica catalyst from the product solution by filtration avoids pyrolysis of the cyclic sulfites during purification by distillation.

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