1997 reactions of organo-metal compounds

reactions of organo-metal compoundsO 0350

01 - 092Unique Reactivities of New Highly Coordinated Ate Complexesof Organozinc Derivatives. — The synthesis and reactivities of newhighly coordinated zincates are described. The more anionic character ofthese compounds such as Li2ZnMe4, Li2ZnMe3(SCN) or Li2ZnMe3(CN) causesinverse selectivity compared to LiZnMe3 or cuprate complexes in a series ofreactions such as the cyclization of epoxide (I), the iodine-zinc exchange of(IV) or the epoxide opening of (VII). The coordinated zincates also showenhanced reactivity towards bromine-zinc exchange of phenyl bromide ( XIII).— (UCHIYAMA, M.; KOIKE, M.; KAMEDA, M.; KONDO, Y.; SAKAMOTO,T.; J. Am. Chem. Soc. 118 (1996) 36, 8733-8734; Fac. Pharm. Sci., TohokuUniv., Aoba, Sendai 980-77, Japan; EN)

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