A convenient synthesis of coumarin-3-carboxylic acids via Knoevenagel condensation of Meldrum's acid with ortho-hydroxyaryl aldehydes or ketones

2003 ◽  
Vol 44 (9) ◽  
pp. 1755-1758 ◽  
Author(s):  
Aimin Song ◽  
Xiaobing Wang ◽  
Kit S Lam
Keyword(s):  
Carboxylic Acids ◽  
Knoevenagel Condensation ◽  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Convenient Synthesis

Ionic Liquid–Mediated Synthesis of Coumarin-3-carboxylic Acids via Knoevenagel Condensation of Meldrum's Acid with ortho-Hydroxyaryl Aldehydes

2008 ◽  
Vol 38 (20) ◽  
pp. 3508-3513 ◽  
Author(s):  
Nitin B. Darvatkar ◽  
Amol R. Deorukhkar ◽  
Sachin V. Bhilare ◽  
Dilip G. Raut ◽  
Manikrao M. Salunkhe
Keyword(s):  
Ionic Liquid ◽  
Carboxylic Acids ◽  
Knoevenagel Condensation ◽  
Meldrum's Acid ◽  
Meldrum’S Acid

Knoevenagel Condensation of Aldehydes with Meldrum's Acid in Ionic Liquids

2009 ◽  
Vol 39 (14) ◽  
pp. 2605-2613 ◽  
Author(s):  
Daryoush Tahmassebi ◽  
Levi J. A. Wilson ◽  
Jerod M. Kieser
Keyword(s):  
Ionic Liquids ◽  
Knoevenagel Condensation ◽  
Meldrum's Acid ◽  
Meldrum’S Acid

A convenient synthesis of unsymmetrical, substituted γ-pyrones from Meldrum's acid

1996 ◽  
Vol 37 (36) ◽  
pp. 6499-6502 ◽  
Author(s):  
Frank J. Zawacki ◽  
Michael T. Crimmins
Keyword(s):  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Convenient Synthesis

Convenient Synthesis of Unsymmetric N,N’-Disubstituted Malondiamides Mediated by Meldrum’s Acid

Synlett ◽  
1996 ◽  
Vol 1996 (12) ◽  
pp. 1209-1210 ◽  
Author(s):  
Hyeon Lee ◽  
Jin Lee ◽  
Ge Lee ◽  
Chwang Pak
Keyword(s):  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Convenient Synthesis

MicrowavE Assisted hydrolysis of Meldrum'S Acid Derivatives and decarboxylation of Derived Malonic Acids

2003 ◽  
Vol 2003 (3) ◽  
pp. 174-175 ◽  
Author(s):  
V.B. Helavi ◽  
S.B. Solabannavar ◽  
U.V. Desai ◽  
R.B. Mane
Keyword(s):  
Carboxylic Acids ◽  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Microwave Assisted ◽  
High Yields ◽  
Short Time ◽  
Hydrolysis Of ◽  
Meldrum's Acid Derivatives

Microwave induced hydrolysis of alkyl Medrum's acids and decarboxylation of derived malonic acids using poly-4-vinylpyridine as a catalyst gives high yields of carboxylic acids in a short time.

scholarly journals L-Tyrosine as an Eco-Friendly and Efficient Catalyst for Knoevenagel Condensation of Arylaldehydes with Meldrum’s Acid in Solvent-Free Condition under Grindstone Method

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
G. Thirupathi ◽  
M. Venkatanarayana ◽  
P. K. Dubey ◽  
Y. Bharathi Kumari
Keyword(s):  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Solvent Free ◽  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Efficient Catalyst ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Active Methylene ◽  
Methylene Group

We investigate L-Tyrosine as an efficient catalyst for the Knoevenagel condensation of arylaldehydes with meldrum’s acid containing cyclic active methylene group in solvent-free condition under grindstone method at room temperature to produce substituted-5-benzylidene-2,2-dimethyl-[1,3]dioxane-4,6-diones 3(a–j).

Ionic Liquid–Mediated Knoevenagel Condensation of Meldrum's Acid and Aldehydes

2006 ◽  
Vol 36 (20) ◽  
pp. 3043-3051 ◽  
Author(s):  
Nitin B. Darvatkar ◽  
Amol R. Deorukhkar ◽  
Sachin V. Bhilare ◽  
Manikrao M. Salunkhe
Keyword(s):  
Ionic Liquid ◽  
Knoevenagel Condensation ◽  
Meldrum's Acid ◽  
Meldrum’S Acid

Convenient synthesis of 5-(Arylamino(Alkylthio)Methylene)-2,2-Dimethyl-1,3-Dioxane-4,6-Diones and 2-Arylthio-4-Quinolones

2003 ◽  
Vol 2003 (3) ◽  
pp. 140-141 ◽  
Author(s):  
Jing Tang ◽  
Xian Huang
Keyword(s):  
Alkyl Halides ◽  
Thermal Cyclization ◽  
Meldrum's Acid ◽  
Meldrum’S Acid ◽  
Convenient Synthesis

Meldrum's acid reacted with an aryl isothiocynate and alkyl halides to afford the 5-(arylamino(alkylthio)methylene)-5-methylthio-2,2-dimethyl-1,3-dioxane-4,6-diones and the compounds underwent thermal cyclization to give the 4-2-arylthio-4(1 H)-quinolones

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