Method of preparing di-organo-magnesium compounds
First Claim
1. A method of preparing a di-organo-magnesium compound of the formula R2 Mg in which R is an organic radical bonded to Mg by carbon, comprising reacting magnesium hydride MgH2 or magnesium and hydrogen with an olefin in the presence of a catalyst comprising a compound of a transition metal of the 4th to 8th secondary groups and an organometallic compound or a hydride of a metal of the 1st to 3rd principal groups of the periodic system.
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Abstract
A method of preparing a di-organo-magnesium compound of the formula R2 Mg in which R is an organic radical bonded to Mg by carbon, comprising reacting magnesium hydride MgH2 or magnesium and hydrogen with an olefin in the presence of a catalyst comprising a compound of a transition metal of the 4th to 8th secondary group and an organometallic compound or a hydride of a metal of the 1st to 3rd principal groups of the periodic system. Advantageously there is also present a polycyclic aromatic compound or a tertiary amine as activator and the reaction is effected in the presence of tetrahydrofuran as solvent at a pressure of about 1 to 300 bars at about 0° to 200° C., the atomic ratio of Mg:transition metal being from about 104 to 10:1, the molar ratio of transition metal compound:organometal compound or metal hydride being from about 0.1 to 10:1, the molar ratio of olefin:magnesium being from about 2 to 10:1 and the olefin being of the formula CH2 ═CHR'"'"' wherein R'"'"' is H or an alkyl, cyclo-alkyl, aryl or aralkyl group.
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20 Claims
- 1. A method of preparing a di-organo-magnesium compound of the formula R2 Mg in which R is an organic radical bonded to Mg by carbon, comprising reacting magnesium hydride MgH2 or magnesium and hydrogen with an olefin in the presence of a catalyst comprising a compound of a transition metal of the 4th to 8th secondary groups and an organometallic compound or a hydride of a metal of the 1st to 3rd principal groups of the periodic system.
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