Electronic pattern preparation, methodology

With Ni(0) catalysts they can react by two different reaction mechanism which give the possibility of synthesizing methylene-cyclopentanes with different substituent patterns (see Eqs. 81, 86 and 87). In Table 11 some of the most interesting results obtained in the preparation of methylenecyclopentanes from [(2-acetoxymethyl)-3-allyl]trimethylsilan or methylenecyclopropanes and electron deficient olefins by this new [3+2]-cycloaddition methodology are summarized. 

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