The novel five-membered heterocycles (tmeda)[graphic omitted]Me2(2a: X = Me, 2b: X = Cl; tmeda = tetramethylethylenediamine), incorporating lithium chloride as a ring forming entity, are obtained from a formal 1,3 dipolar addition of (tmeda)Li[(Me2P)C(SiMe3)2] to an Al–Cl bond of X2AlCl, as shown by an X-ray structure determination of 2a.
H. H. Karsch, K. Zellner and G. Müller, J. Chem. Soc., Chem. Commun., 1991, 466 DOI: 10.1039/C39910000466
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