کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
55386 | 47050 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: New inorganic–organic hybrid materials based on SBA-15 molecular sieves involved in the quinolines synthesis New inorganic–organic hybrid materials based on SBA-15 molecular sieves involved in the quinolines synthesis](/preview/png/55386.png)
In this paper we report on the first mesoporous catalyst based on SBA-15 incorporating simultaneously basic and acid functions able to promote the Friedländer reaction between 2-aminoaryl ketones and ethyl acetoacetate leading to quinolines 1 with high yields. From 2-aminobenzophenone (3a) it is possible to prepare quinoline 1a with the highest selectivity (86%) as compared with other mesoporous acidic catalysts. In contrast, the reaction catalyzed by amine-grafted SBA-15 yielded selectively (98%) the corresponding quinolone 2a in accordance with our previous results. Experimental results have been justified by theoretical calculations as function of the stability of reaction intermediate species, which could be involved in the process.
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► SBA-15/APS was found to be an efficient catalyst for the Friedländer reaction.
► SBA-15/APS was the most selective catalyst for preparation of quinolines via Friedländer reaction.
► Quinoline 1a was synthesized with highest yield and selectivity.
Journal: Catalysis Today - Volume 187, Issue 1, 30 June 2012, Pages 97–103