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An efficient one-pot synthesis of dihydropyrimidinones catalyzed by zirconium hydrogen phosphate under solvent-free conditions
Biginelli reaction solvent-free zirconium hydrogen phosphate
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2010/10/18
A simple, efficient, and practical procedure for the Biginelli reaction using zirconium hydrogen phosphate [Zr(H2PO4)2] as a novel solid acid catalyst is described under solvent-free conditions in hig...
High Yielding Oxidative Deprotection of Silyl and Pyranyl Ethers to Their Corresponding Carbonyl Compounds with Strontium Manganate in the Presence of Aluminium Chloride in Solution and Under Solvent-Free Conditions
Strontium manganate aluminium chloride solvent-free conditions oxidative deprotection tetrahydropyranyl ethers
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2010/4/13
Strontium manganate (SrMnO4) in the presence of aluminium chloride (AlCl3) is an efficient reagent for the high yielding oxidative deprotection of aromatic and aliphatic silyl and pyranyl ethers into ...
A Convenient and Efficient Synthesis of N-Acylsulfonamides in the Presence of Silica Phosphoric Acid under Heterogeneous and Solvent-Free Conditions
N-acylsulfonamide solvent-free silica phosphoric acid heterogeneous condition N-acylation
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2010/4/8
Reaction of sulfonamides with carboxylic acid anhydrides and chlorides in the presence of silica phosphoric acid provided N-acyl sulfonamides in good to high yields. All reactions were performed under...
Solvent-Free Preparation of Primary Carbamates
Solvent-free N-unsubstituted carbamates isocyanic acid compounds containing hydroxyl group
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2010/4/19
Herein, we describe a simple and efficient method for the conversion of compounds containing a hydroxyl group to primary carbamates at room temperature with excellent yield and purity, and without any...