Generation of organo-alkaline earth metal complexes from non-polar unsaturated molecules and their synthetic applications

Organomagnesium compounds, representated by the Grignard reagents, are one of the most classical yet versatile carbanion species which have widely been utilized in synthetic chemistry. These reagents are typically prepared...

The Effect of the Catalyst on the Selectivity of the Heterogeneous 1,4-addition of Organomagnesium Compounds to Chalcone

The conjugate addition in the presence of a catalytic amount of copper is a widely used method for the formation of a C-C bond. However, mostly homogeneous catalysts and/or homogeneous ligands are used in these type of reactions. Previously we reported the heterogeneous catalytic 1,4-addition of organomagnesium compounds to chalcones in the presence of Cu(II) on 4Å molecular sieve support. In this study various heterogeneous supported catalysts were tested in the 1,4-addition reaction, such as La(III), Ti(IV), In(III), Co(II) and Ni(II) on 4Å molecular sieve support. Using the Ti(IV)-4A the desired products could be obtained in excellent yields and no 1,2-addition by-product could be detected. Therefore the reusability of the catalyst was tested in a second reaction. It was found, that the Ti(IV)-4A cannot be reused in this type of reaction, due to significant loss of selectivity. In the second experiment a considerable amount of the 1,2-addition product was formed. Thus, the Cu(II)-4A is a suitable catalyst for the heterogeneous 1,4-addition of organomagnesium compounds to chalcones, as described in our previous work.

Novel transmetalation reaction for electrolyte synthesis for rechargeable magnesium batteries

A straightforward synthesis of electrolyte solutions comprised of binuclear magnesium aluminate complexes without the need for organomagnesium compounds is established. The phenolate based electrolyte exhibits an anodic stability of up to 3.4 V, good ionic conductivity and air-stability.