- MCM-41@Schiff base-Co(OAc)2 as an efficient catalyst for the synthesis of pyran derivatives
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Heterogeneous ordered mesoporous silica materials catalyst, MCM-41@Schiff base-Co(AcO)2, reveals high catalytic performance within the synthesis of pyran derivatives using the multicomponent reaction of aldehydes, malononitrile and 2-naphthol (
- Pan, Shiwei,Li, Puhui,Xu, Guihua,Guo, Jingchang,Ke, Libin,Xie, Canquan,Zhang, Zhoucai,Hui, Yonghai
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p. 1353 - 1371
(2019/11/20)
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- A simple green protocol for the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f] chromene-2-carboxylates in aqueous media
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An eco-friendly and efficient straightforward method has been developed for the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f]chromene-2-carboxylate derivatives via 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalysed cyclisation of β-naphthol and 3-aryl-2-cyanoacrylates using water as a green solvent. All products precipitated from the reaction mixture and were isolated by simple filtration. No further workup nor purification was necessary. The structure of ethyl 3-amino-1-aryl-1H-benzo[f]chromene-2-carboxylate was further confirmed by X-ray single crystal analysis.
- Qian, Siran,Li, Mingjie,Liu, Jiaming,Wang, Cunde
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p. 487 - 490
(2017/08/18)
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- Nano polypropylenimine dendrimer (DAB-PPI-G1): As a novel nano basic-polymer catalyst for one-pot synthesis of 2-amino-2-chromene derivatives
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The nano polypropylenimine dendrimer (DAB-PPI-G1) Lewis base catalyst was found to be a highly efficient and recoverable catalyst for the rapid and convenient synthesis of 2-amino-2-chromene derivatives through the three-component condensation of aromatic aldehydes, malononitrile or ethyl cyanoacetate and phenols under solvent-free conditions in excellent yields and short reaction times.
- Maleki, Behrooz,Sheikh, Safoora
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p. 42997 - 43005
(2015/05/27)
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- Diversity oriented synthesis of benzoxanthene and benzochromene libraries via one-pot, three-component reactions and their anti-proliferative activity
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Libraries of benzoxanthenes, as well as of benzochromenes, were efficiently synthesized via one-pot, three-component reactions of 2-naphthol, aldehydes, and cyclic 1,3-diketones/malononitrile/ethyl cyanoacetate in the presence of catalytic amount of eerie
- Kumar, Atul,Sharma, Siddharth,Maurya, Ram Awatar,Sarkar, Jayant
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scheme or table
p. 20 - 24
(2010/10/03)
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- Task specific onium salt as soluble support in multicomponent synthesis of 4-aryl-2-amino-3-ethoxycarbonyl-naphthopyrans
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In this paper was presented an application of task specific onium salt as soluble support in multicomponent synthesis of 2-amino-3-ethoxycarbonyl- naphthopyrans. The starting task-specific onium salt was functionalized in good yield with chloroethyl alcohol, followed by three steps containing esterification, three components reaction and cleavage from onium salt to afford naphthopyrans in 60% -88% overall yields. All of the products were characterized by IR, 1H NMR, 13C NMR and MS techniques. In this paper was presented an application of task specific onium salt as soluble support in multicomponent synthesis of 2-amino-3-ethoxycarbonyl-naphthopyrans. The starting task-specific onium salt was functionalized in good yield with chloroethyl alcohol, followed by three steps containing esterification, three components reaction and cleavage from onium salt to afford naphthopyrans in 60%-88% overall yields. All of the products were characterized by IR, 1H NMR, 13C NMR and MS techniques.
- Lu, Cuifen,Zhang, Li,Yang, Guichun,Chen, Zuxing
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p. 2469 - 2473
(2011/10/02)
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- Aqueous [bmim][BF4] as green solvent in microwave-assisted organic reactions: Clean synthesis of 1H-benzo[f]chromene derivatives
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The mixture of hydrophilic [bmim][BF4] and water has been found to be a green and safe reaction medium in the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f]chromene derivatives using domestic microwave oven.
- Wen, Xin-Min,Wang, Hui-Yun,Li, Shu-Ng
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p. 776 - 778
(2007/10/03)
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- Clean, one-pot synthesis of naphthopyran derivatives in aqueous media
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A general and practical one-pot synthesis of naphthopyran derivatives using hexadecyltrimethylammonium bromide (HTMAB) as catalyst (10 mol%) is described. This method provides several advantages such as neutral conditions, high yields and simple workup pr
- Jin, Tong-Shou,Zhang, Jian-She,Liu, Li-Bin,Wang, Ai-Qing,Li, Tong-Shuang
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p. 2009 - 2015
(2007/10/03)
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