توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱no silica supported ferric chloride as a green and efficient catalyst for one pot synthesis of 1,2–dihydro–1–arylnaphtho[1,2–e][1,3]oxazine–3–ones
اطلاعات انتشار: Iranian Journal of Catalysis، دوم،شماره۱، ۲۰۱۲، سال ۰
تعداد صفحات: ۴
An efficient green route for the preparation of naphthoxazinones, applying a three–component one–pot condensation reaction of 2–naphthol, aromatic aldehyde and urea in the presence of nano silica supported ferric chloride under solvent–free conditions has been developed. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
۲Fe3O4@SiO2 nanoparticles: An efficient, green and magnetically reusable catalyst for the one–pot synthesis of 14–aryl–14H–dibenzo[a,i]xanthene–8,13–dione derivatives
اطلاعات انتشار: Iranian Journal of Catalysis، ششم،شماره۳، ۲۰۱۶، سال ۰
تعداد صفحات: ۹
An efficient and eco–friendly method for the one–pot synthesis of 14–aryl–14H–dibenzo [a,i]xanthene–8,13–dione derivatives has been developed in the presence of Fe3O4@SiO2 core–shell nanoparticles. The multi–component reactions of 2–hydroxy–1,4–naphthoquinone, β–naphthol and aldehydes were efficiently catalyzed using novel nano–scale materials under reflux conditions. The present method offers several advantages such as environmentally benign, simple work–up, excellent yield of products, short reaction times, little catalyst loading and facile catalyst separation. The nanomagnetic catalyst could be readily recovered using a simple external magnet and reused several times without any significant loss in activity. The catalyst was fully characterized by FT–IR, SEM, XRD, EDX and VSM analysis.
۳Calcium oxide nanoparticles catalyzed one–step multicomponent synthesis of highly substituted pyridines in aqueous ethanol media
اطلاعات انتشار: Scientia Iranica، بيستم،شماره۳، ۲۰۱۳، سال ۰
تعداد صفحات: ۶
An efficient one–pot three–component condensation of aldehydes, thiols and malononitrile has been developed in the presence of calcium oxide nanoparticles. Highly substituted pyridines as privileged medicinal scaffolds have been efficiently prepared via carbon–carbon and carbon–heteroatom bond formation. This method provides a novel and improved approach for the synthesis of 2–amino–4–aryl–3,5–dicyano–6–sulfanylpyridines in terms of excellent yields, short reaction times, reusability and little catalyst loading.
نویسنده(ها): Hamid Reza Hafizi، Atabak، Hamid Ghanbari، Tuedeshki، Anita Shafaroudi، Mahdi Akbari، Javad Safaei، Ghomi، Mojtaba Shariaty، Niassar
اطلاعات انتشار: Journal of Chemical and Petroleum Engineering، چهل و هفتم،شماره۱، ، سال ۱۳۹۲
تعداد صفحات: ۱۲
Cellulose wastes of a wood and paper factory were used to produce activated carbon. Several chemical agents under various conditions were used for production of activated carbon and hence their adsorption properties have been evaluated. In addition the effect of process parameters such as raw material, chemical agent concentration, impregnation ratio, carbonization temperature, carbonization time, activation temperature, activation time, particle size and soaking time on adsorption properties and product yield have been studied. Based on experimental results, the optimum values of process parameters were determined. As an achievement, samples of activated carbon with specific surface area up to 1100 m2 \g and iodine adsorption number up to 1080 mg\g were prepared.
۵An efficient sonochemical synthesis of novel fulleropyrazolines through the reaction of fullerene with phenylhydrazones and PhI(OAc)2
اطلاعات انتشار: Scientia Iranica، بيست و دوم،شماره۳، ۲۰۱۵، سال ۰
تعداد صفحات: ۹
To obtain a rapid, efﬁcient and green synthesis of fulleropyrazoline derivatives, ultrasonic irradiation has been applied to the reaction mixtures containing substituted phenylhydrazones, C60 and PhI(OAc)2. This procedure allowed us to achieve products at room temperature in a good yield and short time without any side product. This convenient procedure will provide a further increase of the diversity within the fullerene derivatives.
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