Ethylmagnesium halides

Scheme 11.6. Routine and enantiose-lective preparation of 1,2-disubstituted cyclopropanols from esters and 2-substituted ethylmagnesium halides. For details, see Table 11.4.

Tetraethyl Lead Ethylmagnesium halide Nalco (US) Not available Anodic... 

P-Elimination is also common in many organoaluminum and organomag-nesium compounds. The P-hydride eliminations of ethylmagnesium halides [Eq. (6.81)] and diethylmagnesium are well recognizetf [Eq. (6.82)] ... 

Methyl- and ethylmagnesium halides were reacted with an ethoxycarbonyl moiety, affording the corresponding tertiary alcohol, in the solid-supported synthesis of 19-raor-la,25-dihydroxyvitamin Ds and its derivatives. PS-DES-Cl [101] resin was employed. Cleavage was achieved with aq. H F. 

Magnesium hydride synthesis goes back almost 100 years with the pyrolysis of ethylmagnesium halides (Jolibois, 1912) to give a mixture of magnesium hydride, magnesium halide and ethylene ... 

The 5-keto acid 11 is supposed to be formed by hydroboration and oxidation of the terminal CC double bond in 12, feasible by allylation of the enone 13. Enone 13, once again, originates from an intramolecular Knoevenagel alkenylation of the a,5-diketone 14 prepared by addition of ethylmagnesium halide to the enol lactone 15 of the 5-keto acid 16. Preceding this keto acid, the allyl compound 17 is formed by nucleophilic opening of the cyclopropane ring with hydride and mefliylation in a position of the carbonyl in the cyclopropyl ketone 18. 

Calcium, Magnesium, and Mercury.—Complete reduction to benzene results when hexafluorobenzene saturated with water reacts with atomic calcium. Pentafluorophenylmagnesium compounds may be prepared by reaction of ethylmagnesium halide with CjFbX (X = H, Cl, Br, or 1). Both bromines... 

Preparation of Pb(C2H5)4 by Electrolysis of Solutions of Ethylmagnesium Halide at Lead Anodes. 

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