52313-87-8Relevant articles and documents
Method for preparing dimethyl 3-methylpentyl-2-enedionate
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Paragraph 0027; 0033-0036, (2018/07/30)
The invention provides a method for preparing dimethyl 3-methylpentyl-2-enedionate. The method has the advantages of easy availability of raw materials, high yield and less waste residues, and is suitable for industrial production.
Allosteric effects in binuclear homo- and heterometallic triple-stranded lanthanide podates
Ryan, Patrick E.,Canard, Gabriel,Koeller, Sylvain,Bocquet, Bernard,Piguet, Claude
, p. 10012 - 10024 (2012/10/30)
This work illustrates a simple approach for deciphering and exploiting the various free energy contributions to the global complexation process leading to the binuclear triple-stranded podates [Ln2(L9)]6+ (Ln is a trivalent lanthanide). Despite the larger microscopic affinities exhibited by the binding sites for small Ln3+, the stability constants measured for [Ln2(L9)]6+ decrease along the lanthanide series; a phenomenon which can be ascribed to the severe enthalpic penalty accompanying the intramolecular cyclization around small Ln(III), combined with increasing anticooperative allosteric interligand interactions. Altogether, the microscopic thermodynamic characteristics predict β1,1,1 La,Lu,L9/β1,1,1Lu,La,L9 = 145 for the ratio of the formation constants of the target heterobimetallic [LaLu(L9)] 6+ and [LuLa(L9)]6+ microspecies, a value in line with the quantitative preparation (>90%) of [LaLu(L9)]6+ at millimolar concentrations. Preliminary NMR titrations indeed confirm the rare thermodynamic programming of a pure heterometallic f-f′ complex.
