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Baumann, A. N.; Music, A.; Karaghiosoff, K.; Didier, D. (2016): Highly diastereoselective approach to methylenecyclopropanes via boron-homologation/allylboration sequences. In: Chemical Communications, Vol. 52, No. 12: pp. 2529-2532
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A simple and efficient diastereoselective synthesis of methylenecyclopropanes is described, in which boron-homologation and allylboration are merged into a one-pot process, starting from in situ generated cyclopropenyllithium species. This unprecedented methodology opens a new route to strained alkylidenecycloalkanes containing a quaternary stereocenter, in high yields and excellent diastereomeric ratios.