- Base catalyzed sustainable synthesis of phenyl esters from carboxylic acids using diphenyl carbonate
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Phenyl esters were obtained in moderate to high yields by reaction of aliphatic and aromatic carboxylic acids with one equivalent of diphenyl carbonate in the presence of catalytic amounts of tertiary amine bases, such as DBU, TBD and DMAP under neat conditions at elevated temperatures (>100°C).
- Kreye, Oliver,Meier, Michael A. R.
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p. 53155 - 53160
(2015/06/25)
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- Esterification of free fatty acids (Biodiesel) using nano sulfated-titania as catalyst in solvent-free conditions
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Nano sulfated titania was tested as catalyst for esterification of free fatty acids, specially methanolic and ethanolic esterification of stearic acid (biodiesels). Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents on ester conversion. This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. This prepared sulfated titania showed high catalytic activity in direct esterification of fatty acids as well as benzoic acids with various alcohols and phenols under solvent-free conditions. This method is of great value because of its environmentally benign character, easy handling, high yields, convenient operation, and green. FT-IR studies are shown that the catalyst can be reused for acylation without loss of catalytic activity.
- Hosseini-Sarvari, Mona,Sodagar, Esmat
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p. 229 - 238
(2013/05/09)
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- An eco-friendly method for the synthesis of aryl and alkyl esters of carboxylic acids using acid activated Indian bentonite
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Esterification of various carboxylic acids with phenol and alcohols has been achieved using acid activated Indian bentonite (AAIB) as catalyst. The catalyst is versatile, and the reaction is found to work well for primary, secondary and tertiary alcohols. The yields are very good under specific reaction conditions.
- Vijayakumar,Iyengar, Pushpa,Nagendrappa, Gopalpur,Prakash, B. S. Jai
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p. 922 - 925
(2007/10/03)
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- The Reaction of N-Carboalkoxy Reissert Analogs with Carboxylic Acids
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The reaction of N-carboalkoxy Reissert analogs in the presence of carboxylic acids yields the corresponding ester and heterocyclic base.Use of methoxy substituted benzoic acids yields, instead of the ester, the respective anhydride.Amides can also be prepared in a similar fashion.
- Popp, Frank D.,Duarte, Frederick F.,Uff, Barrie C.
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p. 1353 - 1355
(2007/10/02)
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