In this work, alkali metal-magnesium aryloxides [MgLi(MesalO)] (1), [MgNa(MesalO)(THF)] for = 2 or 4 (2), and [MgK(MesalO)(THF)] (3) derived from the reaction of MgBu and BuLi, metallic Na or K with methyl salicylate (MesalOH) were used as molecular platforms for the synthesis of new heterometallic compounds [MgLi(EtsalO)] (4), [MgK(EtsalO)] (5), [MgNaAl(MesalO)(OH)(MesalOH)(THF)(HO)] (6), and [MgNa(MesalO)(SalO)(THF)] (7) (EtsalOH = ethyl salicylate and SalOH = salicylic acid) by the reaction with EtOH, exposure to atmospheric moisture or addition of stoichiometric quantities of water. Compounds 4 and 5 were synthesized by transesterification of 1 and 3. Cluster 6 was formed haphazardly by exposing a THF solution of 2 derived using MgBu stabilized with 1 wt% AlEt to atmospheric moisture. Compound 7 was synthesized by partial hydrolysis of 2. Homometallic magnesium aryloxide [Mg(MesalO)(OMe)(HOMe)] (8) was obtained by reaction of MgBu and MesalOH in a methanol solution. The catalytic activity of 1-3 and 6-8 was investigated in the ring-opening polymerization (ROP) of L-lactide (L-LA) or benzaldehyde Tishchenko reaction.
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In this work, alkali metal-magnesium aryloxides [MgLi(MesalO)] (1), [MgNa(MesalO)(THF)] for = 2 or 4 (2), and [MgK(MesalO)(THF)] (3) derived from the reaction of MgBu and BuLi, metallic Na or K with methyl salicylate (MesalOH) were used as molecular platforms for the synthesis of new heterometallic compounds [MgLi(EtsalO)] (4), [MgK(EtsalO)] (5), [MgNaAl(MesalO)(OH)(MesalOH)(THF)(HO)] (6), and [MgNa(MesalO)(SalO)(THF)] (7) (EtsalOH = ethyl salicylate and SalOH = salicylic acid) by the reaction with EtOH, exposure to atmospheric moisture or addition of stoichiometric quantities of water. Compounds 4 and 5 were synthesized by transesterification of 1 and 3. Cluster 6 was formed haphazardly by exposing a THF solution of 2 derived using MgBu stabilized with 1 wt% AlEt to atmospheric moisture.
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