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 9 of 9 for “"potassium tert-butoxide"”.
-
Reductive Alkylation Reactions Using Tetramethyldisiloxane and Potassium Tert-Butoxide Via Reductive-Radical Polar Crossover
… of alkoxide base and silicon hydride species – potassium tert-butoxide (KOtBu) and 1,1,3,3-tetramethyldisiloxane (TMDSO) – facilitates two different reactions involving the formation of C(sp3)-C(sp3) bonds: the hydroalkylation of vinylarenes (chapter 2), and the cross-electrophile coupling of …
-
Synthesis and Use of a Tetradentate Ligand With C4v Symmetry: 1alpha, 2alpha, 3alpha, 4alpha-Tetrahydroxy- 1beta, 2beta, 3beta, 4beta-Tetramethylcyclobutane
… double bonds, using the in situ combination of potassium tert -butoxide and tert -butyl hypochlorite, is presented. The stereospecific intramolecular photodimerization of an enediol pyrophosphate is described. Hydrolysis of the photoproduct from this reaction gives …
-
Synthesis, characterization and properties of epoxide containing block and alternating copolymers
… PEO oligomers have been synthesized with potassium tert-butoxide as an initiator in tetrahydrofuran, and in the bulk. The PEO oligomers were reacted with 4-(chloromethyl) benzoyl chloride to yield a 4-(chloromethyl) benzoate functionalized PEO oligomer quantitatively. This oligomer was …
-
The polymerization of lactic acid anhydrosulphite by anionic initiators
… of lactic acid anhydrosulphite by lithium tert-butoxide in nitrobenzene has been examined by means of gas evolution measurements. The kinetics of the reaction with potassium tert-butoxide (and also sec-butyl lithium) in tetrahydrofuran has been studied using calorimetric techniques. LAAS …
-
Synthesis of chiral phosphino-sulfoximines through phospha-Michael addition and their evaluation as 1,5-P,N-Ligand in asymmetric allylic alkylation
… diphenylphosphine and a catalytic amount of potassium tert-butoxide. The resulting phosphines were in situ treated with borane to prevent oxidation at the phosphorous atom and the corresponding phosphine boranes were isolated in good yields with low to moderate diastereoselectivities. …
-
Investigations into the Manipulation of 1,2,3-Triazoles and Towards an Asymmetric ‘Click’ Reaction of Meso Bis-Alkynes
… 40-45% product. They are then reacted with potassium tert-butoxide to generate the 1,5-disubstituted 1,2,3-triazole in yields of 83% or above. The reaction steps were optimised to give a standard procedure for the conversion of 1,4- to 1,5-triazoles, with a small series of test reactions …
-
Studies on organic electron donors and their applications in chemistry
… halides 5-16 with benzene in the presence of potassium tert-butoxide 17 to form biaryls 18-24 via electron transfer [graphic of electron transfer process].;It also investigates the different outcomes of the reaction when a diketopiperazine is used or not, providing evidence for formation of a …
-
Doubly Bonded Derivatives of Si and Ge: Cycloaddition Reactions and Polymer Chemistry
… of alkyllithium (R = Me, Bu, t-Bu) reagents and potassium tert-butoxide were added to the highly reactive silene Mes2Si=CHCH2t-Bu and the germene Mes2Ge=CHCH2t-Bu, in diethyl ether. 1,2-Addition products were obtained regioselectively and in good yield after treatment with a weak acid with no …
-
Boron-Mediated Semireduction of Alkynoic Acid Derivatives
… this reaction, addition of catalytic amounts of potassium tert-butoxide to propiolamides generates an alkoxide that coordinates to pinacolborane and rapidly produces (E)-cinnamamides in 35 – 96% yield and >99:1 E:Z stereoselectivity. This reaction effectively reduces an internal alkyne to afford …