The cross-coupling reaction between halocarbonyl compounds with Knochel's (dialkoxyboryl)methylzinc reagent provided a new synthesis of oxoalk-2-enylboronates; the in situ cyclization of these boronates gave 3-methylene cyclopentanols or cycloheptanols in high yields.
T. Watanabe, M. Sakai, N. Miyaura and A. Suzuki, J. Chem. Soc., Chem. Commun., 1994, 467 DOI: 10.1039/C39940000467
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