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۱Highly efficient synthesis of carboacyclic nucleosides catalyzed by zinc oxide in 1–butyl–3–methylimidazolium bromide (ZnO\[bmim]Br)
اطلاعات انتشار: Iranian Journal of Catalysis، چهارم،شماره۴، ۲۰۱۴، سال
تعداد صفحات: ۹
Michael addition of pyrimidine and purine nucleobases to substituted as well as unsubstituted α,β–unsaturated esters efficiently proceeds in the presence of catalytic amount of zinc oxide in ionic liquid 1–butyl–3–methylimidazolium bromide (ZnO\[bmim]Br) under microwave irradiation to afford carboacyclic nucleosides, as biologically important compounds, in good to excellent yields and in short reaction times.

۲Friedel–Crafts synthesis of triarylmethanes over 3–methyl–1–sulfonic acid imidazolium tetrachloroaluminate under solvent–free conditions
اطلاعات انتشار: Iranian Journal of Catalysis، پنجم،شماره۳، ۲۰۱۵، سال
تعداد صفحات: ۵
Friedel–Crafts synthesis of triarylmethanes over 3–methyl–1–sulfonicacid imidazolium tetrachloroaluminate under green conditions:In this work, Friedel–Crafts (FC) alkylation of various arenes with aromatic aldehydes catalyzed by 3–methyl–1–sulfonic acid imidazoliumtetrachloroaluminate {[Msim]AlCl4}, as a green catalyst, to prepare triarylmethanes (TAMs) has been carried out. Some aromatic aldehydes were reacted with arenes containing electron–donor substitutions such as anisole, veratrole, phenols, indole and 2–naphtole under solvent–free conditions. The catalyst was recovered and reused successfully for four times. Simple methodology, easy work up, solvent–free condition and excellent yields are some advantages of this work.The promising points for the presented method are high yield, green reaction profile, easier work up and simplicity which make it a useful process for the preparation of various triarylmethanes

۳Nanomagnetite–Fe3O4 as a highly efficient, green and recyclable catalyst for the synthesis of 4,4´–(arylmethylene)–bis(3–methyl–1–phenyl–1H–pyrazol–5–ol)s
اطلاعات انتشار: Iranian Journal of Catalysis، پنجم،شماره۴، ۲۰۱۵، سال
تعداد صفحات: ۱۰
Nanomagnetite–Fe3O4 is used as a highly efficient, mild, green and recyclable nanomagnetite catalyst for the synthesis of 4,4´–(arylmethylene)–bis(3–methyl–1–phenyl–1H–pyrazol–5–ol) derivatives in solvent–free conditions. The condensation reaction of 3–methyl–1–phenyl–1H–pyrazol–5(4H)–one with aromatic aldehydes affords the title compounds in high yields and short reaction times. The nanocatalyst is reusable for seven times without significant loss of its catalytic activity. Short reaction times, high yields, generality, efficiency, recyclability of the catalyst for seven times, simple purification, clean reaction, and agreement with the green chemistry protocols are some advantages of in this method. the catalyst was characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT–IR), X–ray diffractometer (XRD) and vibrating sample magnetometer (VSM).
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