Ferrocenoyl cyclopropane derivatives were prepared via the reaction of an electron-deficient olefin and a first prepared ferrocenoyl nitrogen ylide. The new compounds 2a-11a have been given in good yields and high stereoselectivity (the ratios of trans to cis diastereoisomers were above 99:1) under the optimum condition and characterized by H-1 NMR,C-13 NMR, FAB-MS and IR. The Xray crystal structure of 8a has also been determined.
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Liang et al. (2004) studied this question.