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The cycloaddition of sulfur dioxide to various epoxides was conducted under solvent\u2010free conditions at 100\u2009\u00b0C. The quaternary ammonium\u2010 and amino\u2010functionalized silica catalysts produced cyclic sulfites in high yields (79\u201396\u2009%) that are comparable to those produced by the homogeneous catalysts. The functionalized silica catalysts could be separated from the product solution by filtration, thereby avoiding the catalytic decomposition of the cyclic sulfite products upon distillation of the product solution. Heterogenization of a homogeneous catalyst by immobilization can, therefore, improve the efficiency of the purification of crude reaction products. Despite a decrease in catalytic activity after each recycling step, the heterogeneous pyridine\u2010functionalized silica catalyst provided high yields after as many as five recycling processes.<\/jats:p>","DOI":"10.1002\/cssc.201100492","type":"journal-article","created":{"date-parts":[[2011,12,2]],"date-time":"2011-12-02T21:06:24Z","timestamp":1322859984000},"page":"194-199","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Synthesis of Cyclic Sulfites from Epoxides and Sulfur Dioxide with Silica\u2010Immobilized Homogeneous Catalysts"],"prefix":"10.1002","volume":"5","author":[{"given":"Yasumasa","family":"Takenaka","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takahiro","family":"Kiyosu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Goro","family":"Mori","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun\u2010Chul","family":"Choi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Norihisa","family":"Fukaya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshiyasu","family":"Sakakura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroyuki","family":"Yasuda","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,12]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00121a039"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00126a007"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0518(19970430)35:6<1007::AID-POLA3>3.0.CO;2-1"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0518(19971115)35:15<3235::AID-POLA16>3.0.CO;2-C"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1099-0518(199712)35:17<3673::AID-POLA6>3.0.CO;2-T"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma011189h"},{"key":"e_1_2_6_8_2","unstructured":"\u00a0"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1388-2481(99)00023-5"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-7753(01)00738-8"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpowsour.2005.10.033"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpowsour.2007.05.078"},{"key":"e_1_2_6_13_2","unstructured":"For reviews of cyclic sulfites and sulfates:"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr60226a001"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-1992-26295"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0065-2725(08)60361-X"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0040-4020(00)00494-4"},{"key":"e_1_2_6_18_2","unstructured":"\u00a0"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tetlet.2003.11.032"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo0620866"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tet.2009.06.013"},{"key":"e_1_2_6_22_2","unstructured":"Y.Kato N.Mitsune M.Kotato JP Patent 160580 2003."},{"key":"e_1_2_6_23_2","unstructured":"\u00a0"},{"key":"e_1_2_6_24_2","unstructured":"F. 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