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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Natural and synthetic phosphates: New and clean heterogeneous catalysts for the synthesis of 5-arylhydantoins
Applied Catalysis A: General, Volume 298, No. 1-2, Year 2006
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Description
Natural and synthetic phosphates were used as heterogeneous catalysts to promote the Friedel-Crafts reaction between 5-bromohydantoin and aromatic compounds. In the case of phenol, ortho and para isomers were always obtained. Fluoroapatite (FAP) and natural phosphate (NP) lead to the best selectivity. However, the best overall yield of 5-(hydroxyphenyl)hydantoin was obtained when hydroxyapatite (HAP) was used. This method can also be applied to other aromatics, such as anisole and thiophene. In some cases, activation by zinc bromide (ZnBr2) was also investigated in order to increase the activity of these phosphate catalysts. © 2005 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Tahir, Rachid
Germany, Chemnitz
Technische Universität Chemnitz
Morocco, Casablanca
Faculté Des Sciences Ben M’sick
Banert, Klaus
Germany, Chemnitz
Technische Universität Chemnitz
Sebti, Said
Morocco, Casablanca
Faculté Des Sciences Ben M’sick
Statistics
Citations: 19
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1016/j.apcata.2005.09.024
ISSN:
0926860X