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Showing 1 to 20 of 42 for “"Grignard reagent"”.
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Preparation and reactions of medium-ring Grignard reagent
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1958
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The preparation of a Grignard reagent in the absence of a solvent
This work is a study of the product formed by the reaction of magnesium on bromobenzene in the absence of a solvent, and the results of hydrolysing this product. 1. By refluxing bromo benzene and magnesium, reaction takes place to form phenylmagnesium bromide, di phenyl and terphenyl. The yield of …
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The synthesis of 10-(4-hydroxymethylphenyl)-1,2-Benzanthracene
… or the benzoate B. The preparation of the Grignard reagent of 10-(4’-bromophenyl)-1,2-benzanthracene was unsuccessful. An explanation of this anomaly was not discovered. C. The Grignard reagent or 2-(1-naphthylmethyl)-chloro-benzene was prepared by the use or tetrahydrofuran and …
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The synthesis and thermal rearrangement of 2,5-Dialkyl-1,3,4- triphenyl-2,4-cyclopentadien-1-o1's
… their precursor ketones using phenyllithium and Grignard reagent. In general, the phenyllithium reagent produced products faster and in better yield and purity than the Grignard reagent. The alcohols were rearranged thermally to obtain the appropriate ketones and to obtain information about the …
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Synthetic approaches to new three coordinate Group 6 compounds : chromium alkenyls, molybdenum thiolates and tungsten amides
… olefin to yield an alkenyl bromide. The Grignard reagent, derived from the bromide, is used either as a transmetallation reagent, or reacted with elemental sulfur to form a magnesium thiolate, (THF)2Mg(SC[Ad]Ar)2. The magnesium thiolate can be protonated to give a free thiol, oxidized to …
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The preparation of some unsymmetrical ortho substituted ̲o-dibenzoylbenzenes and 1,3-diphenylisobenzofurans
… were prepared by the action of the appropriate Grignard reagent on o-benzylbenzonitrile (LII) and subsequent hydrolysis of the intermediate ketimine. These were oxidized to the corresponding o-dibenzoylbenzenes (II), 2’-methyl-2-benzoy1 benzophenone (LIV), and 2'-methoxy-2- benzoylbenzophenone …
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A study of the synthesis and reactions of new polynuclear aromatic acids and related compounds
… bromide, as well as by the reaction of this Grignard reagent with 2-bromobenzaldehyde, followed by reduction of the resulting carbinol with lithium aluminum hydride and aluminum chloride. It was found that 2-bromophenyl-1-(3-chloronaphthyl)carbinol thermally decomposed into the corresponding …
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A study of the mechanism of the thermal decomposition of 1-bromo-2-(1-naphthyl)naphthyl-carbinol and related diarylcarbinols
… hydrocarbons by means of the condensation of grignard reagents with aromatic aldehydes did not always lead to the isolation of the desired diarylcarbinols. The delicate relationship between molecular structure and physiological activity demanded that only pure compounds of known structure be …
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Synthesis and characterization of molecules for electron transfer research.
… After methylation and bromination, the Grignard reagent of the resulting bromide was reacted with cyclohexanedione, mono ethylene ketal. The resulting alcohol was changed to the donor precursor through the following functional group transformation steps: dehydration, hydrogenation, …
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Improving the measurement of butyltin compounds in environmental samples
… tropolone complexes of the organotin compounds. Grignard reagent derivatization and measurements by gas chromatography with pulsed flame photometric detection were then employed. The TBT detection limit of 5 ?g Sn/ kg in sediment was below the UK environmental quality target (EQS) value for TBT …
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