one-pot preparation of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles using poly(4-vinylpyridinium butane sulfonic acid) hydrogen sulfate, as an efficient heterogeneous poly(ionic liquid) solid acid catalyst under solvent-free conditions
نویسندگان
چکیده
one-pot preparation of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles has been conducted in the presence of poly(4-vinylpyridinium butane sulfonic acid) hydrogen sulfate, p(4vpbsa)hso4, as an efficient dual acidic catalyst under solvent-free conditions. reusability of the catalyst, easy work-up procedure, eco-friendly reaction conditions, short reaction times and high yields of the products illustrate the utility of this approach.
منابع مشابه
Silica Boron Sulfonic Acid as Heterogeneous and Highly Efficient Solid Acid Catalyst For the Preparation of Hantzsch 1,4-dihydropyridines Under Solvent-Free
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عنوان ژورنال:
organic chemistry researchناشر: iranian chemical society
ISSN
دوره 1
شماره 2 2016
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