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The Effect of Microwave and Ultrasonic Irradiation on the Reactivity of Benzaldehydes under Al2O3, Ba(OH)2 , and K2CO3 Catalysis
Mečiarová, M., Poláčková, V. and Toma, Š. The Effect of Microwave and Ultrasonic Irradiation on the Reactivity of Benzaldehydes under Al2O3, Ba(OH)2 , and K2CO3 Catalysis Chemical Papers, Vol.56, No. 3, 2002, 208-213
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n563a208.pdf
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563a208.pdf |
application/pdf |
170.97KB |
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| Author(s) |
Mečiarová, M.
Poláčková, V.
Toma, Š.
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| Title |
The Effect of Microwave and Ultrasonic Irradiation on the Reactivity of Benzaldehydes under Al2O3, Ba(OH)2 , and K2CO3 Catalysis
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| Journal name |
Chemical Papers
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| Publication date |
2002
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| Year available |
2002
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| Volume number |
56
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| Issue number |
3
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| ISSN |
0366-6352
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| Start page |
208
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| End page |
213
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2002
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| Language |
english
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| Subject |
250000 Chemical Sciences
250300 Organic Chemistry
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| Abstract/Summary |
The solventless microwave reactions of substituted benzaldehydes with imidazole and piperidine on Al2O3 as an inorganic support resulted in the Cannizzaro reaction. The products of Cannizzaro reactions were also the main products at the attempted condensation reactions of benzaldehydes with vinyl acetate using barium hydroxide as the catalyst under microwave irradiation, but corresponding cinnamaldehydes were formed only under ultrasonic irradiation. 4-Chloro- and 4- bromobenzaldehydes proved to be unreactive at sonochemical SNAr substitutions, but afforded SNAr reactions under microwave irradiation.
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