Showing papers on "Transesterification published in 1973"
TL;DR: In this article, the transesterification of DMT with EG was investigated in the presence of various catalysts at 197°C, and the reaction was followed by the measurement of the quantity of methanol which distilled from the reaction vessel.
50 citations
TL;DR: Transesterification reactions of polyhydroxy compounds, such as 1-O-p-nitrobenzoyl, 1 -O-benzyl glycerols, 1,2,3,4-di-O-, 3,4,O-isopropylidene-D-mannitols and D-mannitol, by ethylene carbonate were attempted.
Abstract: Transesterification reactions of polyhydroxy compounds, such as 1-O-p-nitrobenzoyl-, 1-O-benzylglycerols, 1,2;3,4-di-O-, 3,4-O-isopropylidene-D-mannitols, 1,2-O-isopropylidene-α-D-glucofuranose, uridine, 1,2;5,6-di-O-isopropylidene-D-mannitol, and D-mannitol, by ethylene carbonate were attempted; the corresponding products were obtained in good yields except in the case of uridine, which gave 2,2′-anhydro-1-β-D-arabinofuranosyluracil.
44 citations
37 citations
TL;DR: In a preliminary experiment, the synthesis of trehalose 6,6′-dipalmitate has been accomplished by transesterification.
22 citations
TL;DR: In this article, the tri-functional bis(ω-hydroxyalkyl)phosphites were obtained by adding the latter to toluene-and hexamethylenediisocyanate.
10 citations
Patent•
23 Apr 1973
TL;DR: In this article, a process for the transesterification with an ALCOHOL or a LCOHOL containing 3-22 CARBON atoms of a METHACRYLIC ACID ESTER is described.
Abstract: A PROCESS FOR THE TRANSESTERIFICATION WITH AN ALCOHOL OR ALCOHOLS CONTAINING 3-22 CARBON ATOMS OF A METHACRYLIC ACID ESTER FORMED OF AN ALCOHOL HAVING A LOWER BOILING POINT THAN THE ABOVE ALCOHOL, AND WHEREIN THE TRANSESTERIFICATION REACTION IS CARRIED OUT IN THE PRESENCE OF A TITANIUM ALCOHOLATE AS A CATALYST AND DINAPHTHYL PHENYLENE DIAMINE AS A POLYMERIZATION INHIBITOR, IN WHICH THE REACTION IS CARRIED OUT WITH OR WITHOUT BUBBLING AIR THROUGH THE REACTION MIXTURE, AND REMOVING THE DISPLACED ALCOHOL FROM THE REACTION MIXTURE, AS BY DISTILLATION
6 citations
3 citations
3 citations
3 citations
TL;DR: In this paper, the transesterification of triphenyl phosphite with pentaerythritol gives a mixture of two isomeric diphenyl tetraerythrityl diphosphites, the structure of which was confirmed by synthesis.
Abstract: Employing the method of thin-layer chromatography, it was shown that the transesterification of triphenyl phosphite with pentaerythritol gives a mixture of two isomeric diphenyl pentaerythrityl diphosphites, the structure of which was confirmed by synthesis.
TL;DR: In this article, the SNl mechanism was proposed for the transesterification of ethyl acetate and butyl butyrate in the presence of sulfuric acid, and the activation energy of the reaction was 13 kcal /mole.
Abstract: The transesterification of ethyl acetate and butyl butyrate in the presence of sulfuric acid is zero order in ethyl acetate and first order in butyl butyrate The activation energy of the reaction is 13 kcal /mole The SNl mechanism was proposed