Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 752 for “"Esters"”.
-
Equilibration of Unsaturated Esters. Part I. Some Highly Substituted Acyclic Esters. Part Ii. Cycloalkyl-Substituted Esters
Made available in DSpace on 2014-12-05T19:38:20Z (GMT). No. of bitstreams: 1 6402912.pdf: 7888061 bytes, checksum: 2124d5329f24eed9b651c25eb2ccf7d9 (MD5) Previous issue date: 1963
-
Novel cellulose esters
Research in cellulose esters in recent years has concentrated on creating a variety of novel esters with a wide range of thermal and mechanical properties. These cellulose derivatives can be used for membranes, coatings, polymer blends, and other products. Novel cellulose solvent systems …
-
Cellulose Esters and Cellulose Ether Esters for Oral Drug Delivery Systems
… poor drug bioavailability. Cellulose ω-carboxyesters were designed and synthesized specifically for ASD preparations in Edgar lab that can meet the ASD expectations such as high Tg, recrystallization prevention and pH-triggered release due to the free -COOH groups. Rifampicin (Rif), Ritonavir …
-
Tautomeric Equilibria in Unsaturated Esters
Made available in DSpace on 2014-12-05T19:37:42Z (GMT). No. of bitstreams: 1 6101652.pdf: 5985169 bytes, checksum: 42d58004b9de2851685049d2a25640ce (MD5) Previous issue date: 1961
-
Regioselective Synthesis of Cellulose Esters
… of regioselectively functionalized cellulose esters due to the unstable ester bond under aqueous alkaline or acid conditions. In this dissertation, the main objective is to search for new tools to synthesize regioselectively substituted cellulose esters, to understand how structural changes …
-
Regioselective chlorination of cellulose esters
… chemo- and regioselectively chlorinate cellulose esters using MsCl. Compared to bromination of cellulose typically used, this chlorination method has many advantages, including low cost of reagents and ease of separation. The chlorinated cellulose esters are useful intermediates for appending new …
-
Parallel kinetic resolutions using active esters
Obtaining enantiomerically pure compounds is of major importance in modern organic chemistry; the resolution of racemic compounds is a very useful and practical method of achieving this. Parallel kinetic resolutions are an interesting variation on the more classical resolution methods; this method …
-
Synthesis of Single Isomer Trisubstituted Olefins from beta-chloro-alpha-iodo-alpha, beta-Unsaturated Esters and Alkynyl Esters
… (E)-beta-chloro-alpha-iodo-alpha,beta-unsaturated esters cross-couple with 9-alkyl-9-BBN to produce single isomer trisubstituted olefins using palladium-catalyzed Suzuki-Miyaura cross-coupling reaction. This methodology can be further expanded to introduce various alkyl groups at the beta-position. …
-
Fundamental studies on 2,4,6-trichlorophenyl sulfonate esters
… application of 2,4,6-trichlorophenylsulfonate esters in the synthesis of sulfonamides. The sulfonamide unit is an important structural motif due to its frequent occurrence in a range of pharmaceuticals, particularly antibiotics. Sulfonamides can be readily synthesised from pentafluorophenyl …
-
Study of Porous Materials Incorporating Boronate Esters
… self-assembling covalent bonded boronate esters as secondary building units to form a porous material. COF-18Å has the ability to store gases, high surface areas, good thermal stability, but is susceptible to hydrolysis. Preliminary results show that the covalent organic frameworks have …
-
Synthesis of Resveratrol Esters and Aliphatic Acids.
… have been made to design and synthesize RV esters and aliphatic acids in an attempt to increase its bioavailability, solubility in water, and possibly improving its biological activities. Resveratrol esters, 3,5,4'-triacetyloxystilbene <b>(2)</b> and Methyl 1,1',1''- …
-
Carboxylate Ion Displacement in Esters of Dimesitylcarbinol
Made available in DSpace on 2015-05-12T17:02:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0005945.PDF: 2978469 bytes, checksum: 0493d8c128a17a82047d2cce55e2aaf8 (MD5) Previous issue date: 1953
-
The electrophilicity and chemistry of phosphate esters
A series of phosphate esters containing the E.-nitrophenyl moiety as a leaving group were synthesised and their base catalysed hydrolysis and electron impact-induced fragmentations studied. Heterocyclic ester substituents were present in some of the substrates and in-this sense they were considered …
-
Reactivity studies of phosphoric amides and esters
… occurred in the β-chloroethyl phosphate esters.
-
Blends of Biodegradable Thermoplastics With Lignin Esters
… polymers with lignin (L) and lignin esters were prepared by solvent casting and melt processing. Among the biodegradable thermoplastics were cellulose acetate butyrate (CAB), poly-hydroxybutyrate (PHB), poly-hydroxybutyrate-co-valerate (PHBV), and a starch-caprolactone blend (SCL). …
-
Structure-property relationships of novel cellulose esters
Cellulose “waxy” (long-chain aliphatic) tri-esters of lauric (C₁₂), myristic (C₁₄), stearic (C₁₈), and eicosanoic (C₂₀) acids; mixed esters of lauric and acetic acids; and fluorinated mixed esters of 2,2,2-trifluoroethoxyacetic (TFEA) and acetic acids were synthesized in homogeneous DMAc/LiCl …
Page 1 of 38