Convenient tetrahydropyranylation of alcohols and phenols by catalytic ferric sulfate hydrate (Fe2(SO4)3·xH2O)

2005 ◽  
Vol 83 (8) ◽  
pp. 1120-1123 ◽  
Author(s):  
Lingjun Li ◽  
Lizhi Zhu ◽  
Xinying Zhang ◽  
Guisheng Zhang ◽  
Guirong Qu
Keyword(s):  
Green Chemistry ◽  
Ambient Temperature ◽  
Heterogeneous Catalyst ◽  
Good Alternative ◽  
Ferric Sulfate ◽  
Reusable Catalyst ◽  
Direct Transformation ◽  
Mild Conditions ◽  
Sulfate Hydrate ◽  
Efficient Heterogeneous Catalyst

Ferric sulfate hydrate (Fe2(SO4)3·xH2O) is found to be an efficient heterogeneous catalyst for the tetrahydropyranylation of alcohols and phenols at ambient or near ambient temperature. In addition, selective monotetrahydropyranylation of symmetrical diols is achieved under similar conditions. The deprotection of THP ether and direct transformation of THP ether to the corresponding acetate by Fe2(SO4)3·xH2O is also studied. The simplicity of manipulation, mild conditions, reusable catalyst, good selectivity, and environment benign characters make this method a good alternative way for the THP protection of alcohols.Key words: tetrahydropyranylation, selective monotetrahydropyranylation, ferric sulfate hydrate, green chemistry.

An imidazolium based ionic liquid supported on Fe3O4@SiO2 nanoparticles as an efficient heterogeneous catalyst for N-formylation of amines

2017 ◽  
Vol 41 (17) ◽  
pp. 9291-9298 ◽  
Author(s):  
Charu Garkoti ◽  
Javaid Shabir ◽  
Subho Mozumdar
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Sio2 Nanoparticles ◽  
Ferrite Nanoparticles ◽  
Reusable Catalyst ◽  
Efficient Heterogeneous Catalyst

An ionic liquid supported on silica-coated ferrite nanoparticles as an efficient and reusable catalyst for N-formylation of amines.

Magnetically recoverable chitosan-stabilised copper–iron oxide nanocomposite material as an efficient heterogeneous catalyst for azide–alkyne cycloaddition reactions

2015 ◽  
Vol 39 (8) ◽  
pp. 5902-5907 ◽  
Author(s):  
Mitali Chetia ◽  
Abdul Aziz Ali ◽  
Diganta Bhuyan ◽  
Lakshi Saikia ◽  
Diganta Sarma
Keyword(s):  
Iron Oxide ◽  
Heterogeneous Catalyst ◽  
Nanocomposite Material ◽  
Cycloaddition Reactions ◽  
Mild Conditions ◽  
Efficient Heterogeneous Catalyst

Chitosan-stabilised copper–iron oxide nanocomposite material is found to be a very efficient recyclable/reusable heterogeneous catalyst for azide–alkyne cycloaddition reactions under mild conditions.

Salen–Cu(II)@MIL-101(Cr) as an efficient heterogeneous catalyst for cycloaddition of CO2 to epoxides under mild conditions

2017 ◽  
Vol 26 (5) ◽  
pp. 821-824 ◽  
Author(s):  
Caijuan Liu ◽  
Xiao-Huan Liu ◽  
Bo Li ◽  
Lei Zhang ◽  
Jian-Gong Ma ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Mild Conditions ◽  
Efficient Heterogeneous Catalyst
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