H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95313-95317 ◽  
Author(s):  
Sadu Nageswara Rao ◽  
Darapaneni Chandra Mohan ◽  
Subbarayappa Adimurthy
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Β Zeolite ◽  
Solvent Free Conditions ◽  
Recyclable Heterogeneous Catalyst

Efficient transamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines under solvent-free conditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described.

An efficient method for the silylation of hydroxyl groups with hexamethyldisilazane (HMDS) catalyzed by aluminum tris(dihydrogen phosphate) under solvent-free and ambient conditions

2008 ◽  
Vol 86 (8) ◽  
pp. 841-845 ◽  
Author(s):  
Hamid Reza Shaterian ◽  
Majid Ghashang ◽  
Nassrin Tajbakhsh Riki ◽  
Manijeh Asadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Efficient Method ◽  
Room Temperature ◽  
Solvent Free ◽  
Dihydrogen Phosphate ◽  
Hydroxyl Groups ◽  
Ambient Conditions ◽  
Solvent Free Conditions ◽  
Free Hydroxyl ◽  
Recyclable Heterogeneous Catalyst

A highly efficient and mild procedure for the trimethylsilylation of a wide variety of alcohols, including primary, benzylic, secondary, hindered secondary, tertiary, phenols, and oximes with hexamethyldisilazane (HMDS), using Al(H2PO4)3 as a recyclable heterogeneous catalyst at room temperature in a few minutes with excellent yields under solvent-free conditions is described.Key words: trimethylsilylation, hexamethyldisilazane, aluminum tris(dihydrogen phosphate) [Al(H2PO4)3], solvent-free, hydroxyl groups.

Fe(OTs)3/SiO2: a novel catalyst for the multicomponent synthesis of dibenzodiazepines under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (91) ◽  
pp. 74242-74250 ◽  
Author(s):  
Saima Tarannum ◽  
Zeba N. Siddiqui
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Multicomponent Synthesis ◽  
Solvent Free Conditions ◽  
Novel Catalyst ◽  
Recyclable Heterogeneous Catalyst

An Fe(OTs)3/SiO2 catalyst was used as an efficient, recyclable, heterogeneous catalyst for the multicomponent synthesis of dibenzodiazepines.

PMA/SiO2 – An efficient recyclable heterogeneous catalyst for the synthesis of homoallyl alcohols and amines under solvent-free conditions

2008 ◽  
Vol 86 (7) ◽  
pp. 709-713 ◽  
Author(s):  
Biswanath Das ◽  
Rathod Aravind Kumar ◽  
Ponnaboina Thirupathi ◽  
Kanaparthy Suneel ◽  
Pothkan Sunitha
Keyword(s):  
Heterogeneous Catalyst ◽  
Nucleophilic Addition ◽  
Room Temperature ◽  
Addition Reaction ◽  
Phosphomolybdic Acid ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Nucleophilic Addition Reaction ◽  
Recyclable Heterogeneous Catalyst

Aldehydes and imines can efficiently undergo nucleophilic addition reaction with allyltributylstannane in the presence of phosphomolybdic acid supported on silica (PMA/SiO2) under solvent free-conditions to form the corresponding homoallyl alcohols and amines respectively at room temperature in excellent yields. The catalyst can be easily recovered and re-used.Key words: homoallyl alcohol, homoallyl amine, phosphomolybdic acid, heterogeneous catalyst, allyltributylstannane, solvent-free conditions.

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