排序方式: 共有52条查询结果,搜索用时 15 毫秒
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Farhad Shirini Manouchehr Mamaghani Seyyed Vahid Atghia 《Journal of the Iranian Chemical Society》2013,10(3):415-420
Nanoporous Na+-montmorillonite sulfonic acid was found to be an efficient and green catalyst for the synthesis of various 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-dodecahydroxanthene derivatives by the reaction of aldehydes with 2-naphthol and 1,3-cyclohexanedione, respectively. This novel synthetic method has the advantages of high yields, short reaction times and recyclability of the catalyst, simplicity and easy workup compared to the conventional methods reported in the literature. 相似文献
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Manouchehr Mamaghani Abed Badrian 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):2429-2435
The hydroxy group of the Baylis-Hillman adducts is protected with the t-butyldimethylsilyl (TBDMS) group using the reaction of adducts 1a–h with tert-butyldimethylsilyl chloride (TBDMSCl) in the presence of lithium sulfide under nearly acidic reaction conditions. 相似文献
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Synthesis of dibenzoxanthenes through condensation of β-naphthol with various aromatic and aliphatic aldehydes in ethanol as an ecofriendly solvent using RuIII as catalyst is reported.
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M. Mamaghani 《Mathematical Notes》2002,71(3-4):392-399
In this paper, a complete finite rewriting system is constructed for Coxeter groups of the form $$W = \left\langle {a,b,c|a^2 = b^2 = c^2 = (ab)^p = (bc)^q = (ca)^r = 1} \right\rangle $$ with respect to the system of generators $S = \{ a,b,c\} $ , where $p,q,r \in \mathbb{Z}$ , $p,q,r \geqslant 2$ , and $1/p + 1/q + 1/r < 1$ . Rewriting systems of this kind can be used to evaluate the complete growth series of a group. 相似文献
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<正>The first three-component and regioselective synthesis of pyridazinones and phthalazinones from arenes,anhydrides and ArNHNH_2 in the presence of efficient recyclable heterogeneous catalyst,montmorillonite-KSF,in high yield and short reaction time is reported. 相似文献
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Mohammad Nikpassand Manouchehr Mamaghani Mohammad Ali Zanjanchi Nosrat Olah Mahmoodi Massomeh Mirzaeinejad 《中国化学快报》2010,21(1):5-8
<正>A facile and convenient protocol was developed for the synthesis of 1,5-diarylpyrazoles using Baylis-Hillman adducts in the presence of HY-zeolite as an efficient recyclable heterogeneous catalyst in reasonable reaction times(1.5-2.5 h) and high yields (78-90%). 相似文献
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Kayvan Habibi Manouchehr Mamaghani Mohammad Nikpassand 《Journal of inclusion phenomena and macrocyclic chemistry》2018,92(3-4):411-417
Intelligent drug delivery systems are growing and changing too fast, these systems usually show a proper response at the proper time to one or several environmental factors. In the current research a biodegradable drug delivery system (pectin-g-PMA-co-PAAm) was designed and synthesized to release 5 aminosalicylic acid (5-ASA). The synthesized hydrogel is based on natural pectin and is in the form of simultaneous graft copolymerization of synthesized acryl-acid and acryl-amid. Using vinylized bovine serum albumin (VBSA) as cross linker agent is amongst important characteristics of this hydrogel. VBSA was synthesized through BSA modification with methylene-bis-acrylamide (MBA). In addition to having high water absorption, this hydrogel is pH-sensitive. In vitro tests under acid and base conditions of stomach show that this hydrogel is an appropriate option to release drugs through mouth. SEM analysis images show that synthesized hydrogel has a porous surface composed of nano and micro cavities. 相似文献
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Heshmat A. Samimi Manouchehr Mamaghani Khalil Tabatabaeian 《Journal of heterocyclic chemistry》2008,45(6):1765-1770
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Abed Badrian Manouchehr Mamaghani Sharif Kaamyabi 《Phosphorus, sulfur, and silicon and the related elements》2016,191(10):1375-1379
Trimethylsilyl iodide (TMSI) is introduced as an efficient reagent for the one-pot and direct transformation of carbamates of unsaturated β-aminoesters into the corresponding α-methylene-β-lactams and α-arylidene-β-lactams. The mild reaction conditions, excellent yields and easy work-up procedures make it a useful alternative to previously applied procedures for the rapid synthesis of β-lactams from easily available Baylis-Hillman adducts. 相似文献