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Title: Enantioselective synthesis of 1,2,3-trisubstituted cyclopropanes using gem-dizinc reagents. Author: Zimmer LE, Charette AB. Journal: J Am Chem Soc; 2009 Nov 04; 131(43):15624-6. PubMed ID: 19813709. Abstract: The first asymmetric cyclopropanation of allylic alcohols using gem-dizinc carbenoids, which allows the synthesis of 1,2,3-substituted cyclopropane derivatives in high yields and excellent enantio- and diastereoselectivities, is reported. The initially formed cyclopropylzinc undergoes an in situ B/Zn exchange with the stoichiometric chiral ligand to generate a cyclopropyl borinate that can be directly engaged in a Suzuki-Miyaura cross-coupling reaction.[Abstract] [Full Text] [Related] [New Search]