- Dual-catalytic decarbonylation of fatty acid methyl esters to form olefins
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The homogeneous dehydrative decarbonylation of fatty acid methyl esters (FAMEs) to form olefins is reported. In order to facilitate cleavage of the unactivated acyl C-O bond of the alkyl ester, a one pot dual-catalytic directing group strategy was developed through optimization of the individual transesterification and decarbonylation reaction steps.
- Fieser, Megan E.,Schimler, Sydonie D.,Mitchell, Lauren A.,Wilborn, Emily G.,John, Alex,Hogan, Levi T.,Benson, Brooke,LaPointe, Anne M.,Tolman, William B.
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supporting information
p. 7669 - 7672
(2018/07/15)
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- Selective esterification of aliphatic carboxylic acids in the presence of aromatic carboxylic acids over monoammonium salt of 12-tungstophosphoric acid
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Monoammonium salt of 12-tungstophosphoric acid [(NH4)H 2PW12O40] was found to be a practical and useful heterogeneous catalyst for an efficient and selective esterification of aliphatic carboxylic acids with alcohols in the presence of aromatic carboxylic acids. The heteropoly acid-based heterogeneous catalyst has the advantages of a simple workup procedure, water insolubility, and good activity. Copyright Taylor & Francis LLC.
- Giri,Prabhavathi Devi,Gangadhar,Narasimha Rao,Lingaiah,Sai Prasad,Prasad
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- Process for the preparation of carboxylic benzyl esters
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Carboxylic benzyl esters can be prepared by reacting benzyl chloride with carboxylic acids in the presence of one or more quaternary ammonium carboxylates as catalyst.
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- Esterification of carboxylic acids with alcohols under microwave irradiation in the presence of zinc triflatet
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The esterification of aliphatic and aromatic carboxylic acids with various alcohols (1°, 2°, 3°, benzylic) was studied under microwave irradiation in the presence of zinc triflate as catalyst; the reaction times were short and the yield of reactions was good to excellent.
- Shekarriz, Marzieh,Taghipoor, Sohrab,Khalili, Ali Asghar,Jamarani, Mohammad Soleymani
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p. 172 - 173
(2007/10/03)
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- Esters, retroesters, and a retroamide of palmitic acid: Pool for the first selective inhibitors of N-palmitoylethanolamine-selective acid amidase
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Cyclohexyl hexadecanoate, hexadecyl propionate, and N-(3-hydroxypropionyl)pentadecanamide, respectively ester, retroester, and retroamide derivatives of N-palmitoylethanolamine, represent the first selective inhibitors of "N-palmitoylethanolamine hydrolase" described so far. These compounds are devoid of affinity for CB1 and CB 2 receptors and characterized by high percentages of inhibition of N-palmitoylethanolamine-selective acid amidase (84.0, 70.5, and 76.7% inhibition at 100 μM, respectively) with much lower inhibitory effect on either fatty acid amide hydrolase or the uptake of anandamide.
- Vandevoorde, Séverine,Tsuboi, Kazuhito,Ueda, Natsuo,Jonsson, Kent-Olov,Fowler, Christopher J.,Lambert, Didier M.
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p. 4373 - 4376
(2007/10/03)
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- Fatty acid esters of aromatic alcohols and their use in cosmetic formulations
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The present invention relates to compounds according to the structure: Wherein R1is a C11to C21saturated or unsaturated, linear or branched hydrocarbon or a saturated or unsaturated hydrocarbon containing a pendant hydroxyl group, preferably on a carbon atom in a position alpha or beta to the keto group of the ester moiety; X is CH2, OCH2CH2or HC═CHCH2; and R2is H, OCH3, CH3or CH2CH3. These compounds exhibit use in personal care products as dry emollients as well as providing additional characteristics including solvency, dispersants, gloss-enhancing agents, solubilizing agents and melting-point depressants, lubricants, viscosity modulating agents and skin protection factor boosters.
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- Convenient synthesis of benzyl and allyl esters using benzyl and allyl 2,2,2-trichloro-acetimidate
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Benzyl and allyl 2,2,2-trichloroacetimidate are efficient reagents for the preparation of benzyl and allyl esters of carboxylic acids in the presence of a catalytic amount of boron trifluoride-diethyl ether complex.
- Kokotos, George,Chiou, Antonia
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p. 168 - 170
(2007/10/03)
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- METAL-CATALYZED SYNTHESIS OF CARBOXYLIC ESTERS UTILIZING (E)-PHENYL 2-PYRIDYL KETONE O-ACYLOXIMES (PPAO)
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(E)-Phenyl 2-pyridyl ketone O-acyloximes (PPAO) could be highly activated by metal ions such as Fe(3+), Cu(2+), and Zn(2+), and the most effective catalyst for the synthesis of carboxylic esters was found to be Zn(2+).Furthermore, sterically hindered carboxylic esters were easily obtained utilizing PPAOs and alcoholates in high yields.
- Miyasaka, Tadayo,Ishizu, Hidehiro,Sawada, Akihiro,Fujimoto, Akiko,Noguchi, Shunsaku
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p. 871 - 874
(2007/10/02)
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