Preparation method of heteronuclear metal complexes and cyclic carbonates catalyzed by them
A technology for metal complexes and compounds is applied in the field of preparation of cyclic carbonates, which can solve the problems of catalyst dosage and reaction pressure reduction, and achieve the effects of simple post-treatment, good reaction selectivity and high yield.
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Embodiment 1
[0050] Diethylene glycol amine bridged bisaryloxyyttrium-benzyloxymagnesium complex L 2 Y 2 Mg(OCH 2 Ph) 2 (THF) 2 Synthesis:
[0051] The reaction scheme is as follows (RE is yttrium):
[0052]
[0053] (1) Put 1.63 grams of H 3 L (3.0 mmol) was dissolved in tetrahydrofuran and added to a solution containing 1.31 g of YCp 3 (THF) (3.0 mmol) in tetrahydrofuran solution, the reaction was stirred at 25°C for 24 hours, and the system was a pale yellow transparent solution.
[0054] (2) 1.5 mL of a hexane solution of tetrabutylmagnesium (1.5 mmol, 1.0 mol / L) was added to 3.0 mL of a tetrahydrofuran solution (3.0 mmol, 1.0 mol / L) of benzyl alcohol (ie, benzyl alcohol) while stirring. liter), then 10 mL of tetrahydrofuran was added to dilute the reaction solution, and the reaction was carried out at 25° C. overnight. The system was a colorless and transparent solution.
[0055] (3) Mix the reaction solutions of step (1) and step (2), rinse the reaction flask with tetrahyd...
Embodiment 2
[0061] Diethylene glycol amine bridged bisaryloxyytterbium-benzyloxymagnesium complex L 2 Yb 2 Mg(OCH 2 Ph) 2 (THF) 2 Synthesis:
[0062] (1) Put 1.63 grams of H 3 L (3.0 mmol) was dissolved in tetrahydrofuran and added to a mixture containing 1.32 g of YbCp 3 (THF) (3.0 mmol) in tetrahydrofuran solution, the reaction was stirred at 25° C. for 24 hours, and the system was a bright yellow transparent solution.
[0063] (2) 1.5 mL of a solution of tetrabutylmagnesium in hexane (1.5 mmol, 1.0 mol / L) was added to 3.0 mL of a solution of benzyl alcohol in tetrahydrofuran (3.0 mmol, 1.0 mol / L) with stirring, Then 10 mL of tetrahydrofuran was added to dilute the reaction solution, and the reaction was carried out at 25° C. overnight. The system was a colorless and transparent solution.
[0064] (3) Mix the reaction solutions of step (1) and step (2), rinse the reaction flask with tetrahydrofuran, and react in an oil bath at 50° C. for 3 days.
[0065] (4) The solvent was remo...
Embodiment 3
[0068] Diethylene glycol amine bridged bisaryloxyneodymium-benzyloxymagnesium complex L 2 Nd 2 Mg(OCH 2 Ph) 2 (THF) 2 Synthesis:
[0069] (1) Put 1.63 grams of H 3 L (3.0 mmol) was dissolved in tetrahydrofuran and added to a solution containing 1.23 g of NdCp 3 (THF) (3.0 mmol) in tetrahydrofuran solution, the reaction was stirred at 25° C. for 24 hours, and the system was a blue transparent solution.
[0070] (2) 1.5 mL of a solution of tetrabutylmagnesium in hexane (1.5 mmol, 1.0 mol / L) was added to 3.0 mL of a solution of benzyl alcohol in tetrahydrofuran (3.0 mmol, 1.0 mol / L) with stirring, Then 10 mL of tetrahydrofuran was added to dilute the reaction solution, and the reaction was carried out at 25° C. overnight. The system was a colorless and transparent solution.
[0071] (3) Mix the reaction solutions of step (1) and step (2), rinse the reaction flask with tetrahydrofuran, and react in an oil bath at 50° C. for 3 days.
[0072] (4) The solvent was removed unde...
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