- Nanoporous TiO2 containing an ionic liquid bridge as an efficient and reusable catalyst for the synthesis of: N, N ′-diarylformamidines, benzoxazoles, benzothiazoles and benzimidazoles
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In this work, a green and efficient procedure is reported for the preparation of N,N'-diarylformamidines, benzoxazoles, benzothiazoles, and benzimidazoles using nanoporous TiO2 containing an ionic liquid bridge. This reagent is prepared via the modification of nanoporous TiO2 with bis-3-(trimethoxysilylpropyl)-ammonium hydrogen sulfate (TiO2-[bip]-NH2+ HSO4-). The procedure gave the products in excellent yields in very short reaction times under solvent-free conditions. The reusability of the catalyst is the other important feature of the reported method.
- Mazloumi,Shirini,Goli-Jolodar,Seddighi
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p. 5742 - 5752
(2018/04/23)
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- An efficient method for the synthesis of formamidine and formamide derivatives promoted by sulfonated rice husk ash (RHA-SO3H)
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A mild, simple and efficient method has been developed for the promotion of the preparation of N,N′-diphenylformamidines from various aromatic amines and ethyl orthoformate using sulfonated rice husk ash (RHA-SO3H) solid acid catalyst. This reagent has also been used for the N-formylation of a variety of amines using formic acid under solvent-free conditions. The procedures gave the products in very short reaction times and good-to-high yields. Also this catalyst can be reused for five times without loss of its catalytic activity.
- Seddighi, Mohadeseh,Shirini, Farhad,Mamaghani, Manouchehr
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p. 433 - 439
(2015/02/05)
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- Manipulating magnetism: Ru25+ paddlewheels devoid of axial interactions
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Variable-temperature magnetic and structural data of two pairs of diruthenium isomers, one pair having an axial ligand and the formula Ru 2(DArF)4Cl (where DArF is the anion of a diarylformamidine isomer and Ar = p-anisyl or m-anisyl
- Chiarella, Gina M.,Cotton, F. Albert,Murillo, Carlos A.,Ventura, Karen,Villagrán, Dino,Wang, Xiaoping
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p. 9580 - 9589
(2014/07/22)
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- Pushing back the limits of hydrosilylation: Unprecedented catalytic reduction of organic ureas to formamidines
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Pushing back the limits: A novel catalytic transformation has been designed to prepare formamidine derivatives by reduction of substituted ureas with hydrosilanes. Simple iron catalysts based on commercially available iron salts and phosphine ligands prov
- Pouessel, Jacky,Jacquet, Olivier,Cantat, Thibault
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p. 3552 - 3556
(2014/01/06)
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- Ultrasound promoted expeditious, catalyst-free and solvent-free approach for the synthesis of N,N′-diarylsubstituted formamidines at room temperature
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An effortless and efficient protocol was developed for the synthesis of N,N′-diarylsubstituted formamidines under environment-friendly conditions. Ultrasonic energy was employed to obtain the desired products in excellent yields with high purity under solvent-free and catalyst-free conditions. Products were purified by the crystallization technique to avoid excess utilization of organic solvents.
- Dar, Bashir Ahmad,Ahmad, Syed Naseer,Wagay, Mohammad Arif,Hussain, Altaf,Ahmad, Nisar,Bhat, Khursheed Ahmad,Khuroo, Mohammad Akbar,Sharma, Meena,Singh, Baldev
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p. 4880 - 4884
(2013/09/02)
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- Biomimetic approach for the synthesis of N,N′-diarylsubstituted formamidines catalyzed by β-cyclodextrin in water
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An environmentally benign and highly efficient biomimetic approach for the synthesis of N,N′-diarylsubstituted formamidines in water catalyzed β-cyclodextrin is described under neutral condition with quantitative yields of products. β-Cyclodextrin has bee
- Patil, Dipak R.,Dalal, Dipak S.
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p. 1125 - 1128
(2012/11/13)
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- Amine exchange in formamidines: An experimental and theoretical study
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N-H-containing formamidines combine a reasonably strong association to carboxylic acids to form complexes of well-defined geometries with a simultaneous proton-induced electrophilicity enhancement that allows for the exchange of their amine portion. The N
- Capela, Marinha Df.,Mosey, Nicholas J.,Xing, Liyan,Wang, Ruiyao,Petitjean, Anne
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supporting information; experimental part
p. 4598 - 4612
(2011/06/24)
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