کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1270060 | 972474 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Iodobenzene diacetate (IBD) catalyzed an quick oxidative aromatization of Hantzsch-1,4-dihydropyridines to pyridines under ultrasonic irradiation Iodobenzene diacetate (IBD) catalyzed an quick oxidative aromatization of Hantzsch-1,4-dihydropyridines to pyridines under ultrasonic irradiation](/preview/png/1270060.png)
This project was undertaken to demonstrate the potential of iodobenzene diacetate for the oxidative aromatization of Hantzch-1,4-dihydropyridines under ultrasonic irradiation. All reactions were carried out under ultrasonic irradiation and results were compared with traditional method. Sonochemical switching was observed in case of oxidative aromatization of 4-n-alkyl substituted 1,4-DHP. Without sonication, dealkylation occurred in case of n-alkyl substituted 1,4-DHP (ionic mechanism) but under ultrasonic irradiation, n-alkyl group was not expelled (radical mechanism). However, secondary alkyl (isopropyl) and benzyl group were expelled under both conditions.
► The potential of IBD was demonstrated under ultrasonic irradiation.
► The oxidation of 1,4-DHP was carried out by IBD.
► The sonochemical switching was observed in case of oxidative aromatization of 4-n-alkyl substituted 1,4-DHP.
Journal: Ultrasonics Sonochemistry - Volume 19, Issue 4, July 2012, Pages 729–735