ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

The Effect of Microwave and Ultrasonic Irradiation on the Reactivity of Benzaldehydes under Al2O3, Ba(OH)2 , and K2CO3 Catalysis

M. Mečiarová, V. Poláčková, and Š. Toma

Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, SK-842 15 Bratislava

 

E-mail: toma@fns.uniba.sk

Received: 30 November 2001

Abstract: 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.

Full paper in Portable Document Format: 563a208.pdf

 

Chemical Papers 56 (3) 208–213 (2002)

Wednesday, July 03, 2024

IMPACT FACTOR 2023
2.1
SCImago Journal Rank 2023
0.381
SEARCH
Advanced
VOLUMES
© 2024 Chemical Papers