ChemInform Abstract: Naturally Occurring α-Amino Acid: A Simple and Inexpensive Catalyst for the Selective Synthesis of 5-Aryl-2-oxazolidinones from CO2and Aziridines under Solvent-Free Conditions.

ChemInform ◽  
2010 ◽  
Vol 41 (20) ◽  
Author(s):  
Huan-Feng Jiang ◽  
Jin-Wu Ye ◽  
Chao-Rong Qi ◽  
Liang-Bin Huang
Keyword(s):  
Amino Acid ◽  
Solvent Free ◽  
Selective Synthesis ◽  
Naturally Occurring ◽  
Solvent Free Conditions

Selective synthesis of conjugated enynes from α-arylalkynols using LiCl-Acidic Al2O3 under solvent-free conditions

2002 ◽  
Vol 2002 (8) ◽  
pp. 378-380 ◽  
Author(s):  
Ali Pourjavadi ◽  
Gholam Bagheri Marandi
Keyword(s):  
Solvent Free ◽  
Selective Synthesis ◽  
Solvent Free Conditions ◽  
Conjugated Enynes

α-Arylalkynols were converted into conjugated enynes (in a selective manner under solvent-free conditions) using the LiCl-acidic Al2O3 couple as catalyst and support.

Natural organic acids promoted Beckmann rearrangement: Green and expeditious synthesis of amides under solvent-free conditions

2014 ◽  
Vol 68 (4) ◽  
Author(s):  
Sandeep Rohokale ◽  
Santosh Kote ◽  
Santosh Deshmukh ◽  
Shankar Thopate
Keyword(s):  
Microwave Irradiation ◽  
Organic Acids ◽  
Tartaric Acid ◽  
Reaction Rate ◽  
Beckmann Rearrangement ◽  
Solvent Free ◽  
Conventional Heating ◽  
Highly Efficient ◽  
Naturally Occurring ◽  
Solvent Free Conditions

AbstractNaturally occurring organic acids are reported to be highly efficient promoters of the Beckmann rearrangement. Citric, oxalic, tartaric, malic, succinic, malonic, and fumaric acids efficiently promote the Beckmann rearrangement under solvent-free conditions and thermal and microwave irradiation. Tartaric acid was found to be the best promoter of the Beckmann rearrangement under conventional conditions as well as under microwave irradiation. Compared with conventional heating, microwave irradiation provides higher reaction rate and slightly higher yields.

The smallest organocatalyst in highly enantioselective direct aldol reaction in wet solvent-free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24311-24315 ◽  
Author(s):  
Sudipto Bhowmick ◽  
Sunita S. Kunte ◽  
Kartick C. Bhowmick
Keyword(s):  
Amino Acid ◽  
Room Temperature ◽  
Aldol Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Natural Amino Acid ◽  
Asymmetric Aldol ◽  
Direct Aldol Reaction ◽  
Solvent Free Conditions ◽  
Asymmetric Aldol Reaction

The catalytic efficacy of the smallest organocatalyst, l-proline hydrazide, prepared from a cheaply available natural amino acid, such as l-proline, was studied for the direct asymmetric aldol reaction of various ketones with aromatic aldehydes at room temperature in the presence of several acid additives.

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