Magnesium preparation

The reactivities are compared in Table I, along with some other methods of activation. It is clear that the magnesium prepared by reduction of MgC is the most reactive. ... 

Magnesium phosphate compounds, uses for, 75 416-416 Magnesium phosphide, 19 58 Magnesium preparation, for Grignard reactions, 72 824... 

Adjust cells to a density of 1 x 10 cells/mL in PBS without calcium and without magnesium. Prepare approx 10 mL of cell suspension. 

Magnesium depletion is a predictable consequence of the chronic use of loop agents and occurs most often in patients with dietary magnesium deficiency. It can be reversed by administration of oral magnesium preparations. 

Amides.1 Carboxylic acids can be converted directly into amides by reaction with a bis(dialkylamino)magnesium, prepared in situ by reaction of 2R2NH with n-butyl-sec-butylmagnesium (Alfa). 

Another interesting variation of the potassium-magnesium chloride reduction is to carry out the reduction in a mixed solvent system of THF and triethylamine (ratio 1 1). This method also yields a form of magnesium that is nearly as reactive as the lithium reduction procedure. Table 3 shows reactions of p-chlorotoluene with Rieke magnesium prepared in THF-Et N. Few reports have appeared using this form of highly reactive magnesium. 

Table 3 Reactions of p-Chlorotoluene with Rieke Magnesium Prepared in THF-Et3N...

It should be noted that this reported chemistry was performed with Rieke magnesium prepared by the MgCl2—KI—K—THF system. Rieke magnesium prepared by the safer lithium naphthalenide reduction approach should be expected to give the same or even improved results compared with what is reported here. 

Highly activated magnesium, prepared using Rieke s method (see 10.2.3.2.1 and 10.2.3.2.3), reacts with 1,3-dienes, including 1,3-butadiene, isoprene, myrcene and ( ),( )-1,4-diphenyl-1,3-butadiene . 

Clinically important, potentially hazardous interactions with aluminium hydroxide gel, calcium containing preparations, iron preparations, magnesium preparations, NSAIDs... 

Table 2. Reaction of p-chlorotoluene with activated magnesium prepared from various magnesium salts1)...

Magnesium prepared from MgCl2-K-THF, reflux 2-3 hr. Mg/p-chlorotoluene = 2. salt MX added prior to McOl2 reduction. 

Fig. 1. Activated magnesium prepared by potassium reduction of MgCl2 in the presence of KI...

Most treatments in ruminants require the addition of calcium to the magnesium salts to correct the hypocalcemia that is commonly observed in these animals. Magnesium enemas have also been used [86]. Injectable or rectally administered magnesium is then followed by the use of oral magnesium preparations until the Mg levels have stabilized and the underlying cause has been corrected. 

Preparation of a Grignard Reagent Using Rieke Magnesium Prepared Using Potassium-Potassium iodide 1-Norbornanecarboxyi Acid... 

Chemistry of (2-Butene-1,4-diyl)magnesium Preparation of Activated Magnesium (Mg )... 

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