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Alkylation–acylation of P-xylene with γ-Butyrolactone or Vinylacetic Acid Catalyzed by Heteropolyacid Supported on Silica by Yuichi Kamiya; Yasunobu Ooka; Chisato Obara; Ryuichiro Ohnishi; Toshio Fujita; Youhei Kurata; Katsuyuki Tsuji; Tetsuo Nakajyo; Toshio Okuhara is a Chemistry article available to read on EtoBox.
What is Alkylation–acylation of P-xylene with γ-Butyrolactone or Vinylacetic Acid Catalyzed by Heteropolyacid Supported on Silica about?
Friedel-Crafts-type reaction of p-xylene with ␥-butyrolactone or vinylacetic acid over H 4 SiW 12 O 40 supported on SiO 2 have been investigated with different loadings of H 4 SiW 12 O 40 . The catalytic performance of H 4 SiW 12 O 40 /SiO 2 have been compared with those of typical solid acid catalysts such as zeolites, ion-exchanged resins, and binary oxides. H 4 SiW 12 O 40 supported on SiO 2 was superior in activity and selectivity to 5,8-dimethyl-␣-tetralone compared to other catalysts for the reaction between p-xylene and ␥-butyrolactone. SiO 2 -supported H 4 SiW 12 O 40 also was efficient for the formation of 3,4,7-tetramethyl-␣-indanone from p-xylene and vinylacetic acid. The formation of 5,8-dimethyl-␣-tetralone is extremely sensitive to the load of H 4 SiW 12 O 40 on SiO 2 , reaching a maximum at approximately 30 wt%, due to the change in the acid amount of the outermost surface as determined by benzonitrile-temperature programmed desorption. By analogy with reaction between 1,3,5-trimethylbenzene and ␥-butyrolactone, the reaction pathway involves initial alkylation of p-xylene with ␥-butyrolactone, followed by intramolecular acylation to 5,8-dimethyl-␣-tetralone, which wa
Who reads Alkylation–acylation of P-xylene with γ-Butyrolactone or Vinylacetic Acid Catalyzed by Heteropolyacid Supported on Silica?
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- Author
- Yuichi Kamiya; Yasunobu Ooka; Chisato Obara; Ryuichiro Ohnishi; Toshio Fujita; Youhei Kurata; Katsuyuki Tsuji; Tetsuo Nakajyo; Toshio Okuhara
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1381-1169)
- Published
- 2007
- Language
- EN
- Field
- Chemistry (Physical Sciences)