Results 201 to 210 of about 74,124 (234)
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Transesterification by Peptidyl Transferase
Nature, 1970Peptidyl transferase, the enzyme which catalyses formation of peptide bonds, can be stimulated by CCA, the 3′-terminus of tRNA, to catalyse also a transesterification reaction involving nucleophilic attack of Met-tRNAfMet by ethanol to yield fMet-ethyl ester.
E, Scolnick +3 more
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Transesterification reactions in molten polymers
Polymer Engineering & Science, 1987Abstract The transesterification reaction of molten ethylene and vinyl alcohol copolymers (EVA), in presence of paraffinic alcohols and basic catalysts, leads to high conversion of the ester groups to secondary alcohol in both discontinuous and continuous processing equipment. Various kinds of alcohols and two different catalysts were
M. Lambla, J. Druz, A. Bouilloux
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Transesterification: An analytical and formulation problem
Journal of Pharmaceutical and Biomedical Analysis, 1985A range of esters including salicylates, nicotinates and parabens have been shown to undergo reversible, base-catalysed transesterification in hydroalcoholic solutions. In non-alcoholic solution phenyl salicylate undergoes a concentration-dependent oligomerization which yields salsalate and other products.
W J, Irwin, Q N, Masuda, A, Li Wan Po
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Base-Catalyzed Transesterification of Thionoesters
The Journal of Organic Chemistry, 2018Here we report a convenient synthesis of thionoesters by base-catalyzed transesterification. Benzyl and alkyl thionobenzoates and thionoheterobenzoates were efficiently prepared using various alcohols catalyzed by the corresponding sodium alkoxide. This methodology features a broad substrate scope, good to excellent yields, short reaction times, while ...
Josiah J. Newton +2 more
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Heterogeneous catalytic transesterification of phosphatidylcholine
Bioresource Technology, 2011The transesterification of phosphatidylcholine (PC) via homogeneous and heterogeneous catalysis was investigated for the production of fatty acid methyl esters (FAME) i.e. biodiesel. Calcium methoxide and calcium oxide were used as heterogeneous catalysts, and KOH as a homogeneous catalyst for the transesterification of phosphatidylcholine (PC)--a ...
Rajesh Kumar, Balasubramanian +1 more
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Transesterification on ?imprinted? silica
Catalysis Letters, 1996The transesterification reaction of ethyl phenylacetate to hexyl phenylacetate on an “imprinted” silica catalyst of the type first reported by Heilmann and Maier is investigated. In the presence of sulfuric acid co-catalysts, the data obtained here reveal that catalytic activity can be due to phosphorous species leached into solution; no evidence for ...
Wayez R. Ahmad, Mark E. Davis
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