توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱One–pot three component synthesis of 2–amino–4H–chromenes under green and high efficient conditions
نویسنده(ها): ،
اطلاعات انتشار: Iranian Journal of Catalysis، پنجم،شماره۴، ۲۰۱۵، سال
تعداد صفحات: ۷
A simple, mild and high efficient procedure for one pot three component synthesis of 2–amino 4–H chromene derivatives was studied. The reaction was performed in water using aryl aldehydes, malononitrile and resorcinol, phloroglucinol or naphthole in the presence of N–methyl D–glucamine (Meglumine) as a green high efficient catalyst. The reaction was studied in thermal, microwave (MW) and ultrasonic (US) conditions. Obtained results show that meglumine, as a green catalyst, has high efficiency in all reaction conditions and the yield of products (in all cases) is high to excellent. Environment friendly solvent and catalyst, short reaction times and high yield products are the advantageous of presented research.

۲New method for preparation of MWCNT–SO3H as an efficient and reusable catalyst for the solvent–free synthesis of 3,4–dihydropyrimidin–2(1H)–ones\thiones
اطلاعات انتشار: Iranian Journal of Catalysis، پنجم،شماره۴، ۲۰۱۵، سال
تعداد صفحات: ۸
Multiwalled carbon nanotubes (MWCNTs) have been functionalized with –SO3H groups using new three steps chemical routes. Firstly, OH groups have been attached to CNT surfaces through a radical reaction. The second step involves converting the hydroxyl groups into the oxide one and last step included the attachment of –SO3H groups on the MWCNTs surfaces in the presence of 1–butyl–3–methyl imidazolium tetrafluoroborate [bmim]BF4 ionic liquid as catalyst. Functionalized MWCNTs were characterized by Fourier transform infrared (FTIR), X–ray diffraction (XRD), scanning electron microscopy (SEM) and Raman Spectroscopy. Obtained product have be used as acidic nano catalyst in the Biginelli reaction for the synthesis of 3,4–dihydropyrimidin–2(1H)–one derivatives. The reaction was performed under solvent–free conditions with excellent yields and short reaction times in the presence of a reusable efficient catalyst.
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