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Das α‐Brom‐enolat (I) wird in 2 Stufen ‐ zunächst mit Methyl‐Li bei 0 °C in Ether, dann mit tert.‐Butyl‐Li bei ‐78°C ‐ zum Dianion (IIa) lithiiert, das durch Silylierung regioselektiv den Enolether (IIb) liefert.

087ChemInform Abstract The stoichiometry and stability constants of the reactions of the cation Me3Sn(H2O)+ 2 with a series of ligands, particularly those of biological interest having a variety of donor atoms, are determined using a computer program. The most stable complexes are formed with ligands having sulfur donor atoms.