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Reactions of organo-metal compoundsO 0350 Nanosized Iron- or Copper-Catalyzed Homocoupling of Aryl, Heteroaryl, Benzyl,

and Alkenyl Grignard Reagents. — Homocoupling of different Grignard reagents is efficiently catalyzed by iron or copper nanoparticles, generated in situ from excess lithi-um powder, ferrous or cupric chloride, and 4,4'-di-tert-butylbiphenyl (DTBB) as elec-tron carrier. The reaction of (E/Z)-styrylmagnesium bromide (V) proceeds stereoselec-tively (99%) to the corresponding (E,E)-product. — (MOGLIE, Y.; MASCARO, E.; NADOR, F.; VITALE, C.; RADIVOY*, G.; Synth. Commun. 38 (2008) 22, 3861-3874; Dep. Quim., Univ. Nac. Sur, 8000 Bahia Blanca, Argent.; Eng.) — H. Haber

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