3 years ago

Hydrocarbon-Soluble Bis(trimethylsilylmethyl)calcium and Calcium–Iodine Exchange Reactions at sp2-Hybrized Carbon Atoms

Hydrocarbon-Soluble Bis(trimethylsilylmethyl)calcium and Calcium–Iodine Exchange Reactions at sp2-Hybrized Carbon Atoms
Alexander Koch, Georg Pohnert, Sven Krieck, Marino Wirgenings, Helmar Görls, Matthias Westerhausen
Hydrocarbon-soluble and highly reactive [(L)xCa(CH2SiMe3)2] (L = tetrahydropyran, x = 4 (2a); L = tmeda, x = 2 (2b)) is synthesized by the metathesis reaction of Me3SiCH2CaI (1-I) with KCH2SiMe3. The durability of 2a in tetrahydropyran solution at 0 °C is sufficiently high for subsequent chemical transformations. The reaction of ICH2SiMe3 with calcium in diethyl ether yields unique cage compound [(Et2O)2Ca(I)2·(Et2O)2Ca(I)(OEt)·(Et2O)Ca(I)(CH2SiMe3)] (3). We demonstrate that alkylcalcium complexes are valuable reagents for calcium–iodine exchange reactions at Csp2–I functionalities.

Publisher URL: http://dx.doi.org/10.1021/acs.organomet.7b00592

DOI: 10.1021/acs.organomet.7b00592

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