6 Borylation of Carbonyl and Imine Groups
Book
Editor: Fernández, E.
Title: Advances in Organoboron Chemistry towards Organic Synthesis
Print ISBN: 9783132429710; Online ISBN: 9783132429758; Book DOI: 10.1055/b-006-164898
2020 © 2020. Thieme. All rights reserved.
Georg Thieme Verlag KG, Stuttgart
Subjects: Organic Chemistry;Chemical Reactions, Catalysis;Organometallic Chemistry;Laboratory Techniques, Stoichiometry
Science of Synthesis Reference Libraries
Parent publication
Title: Science of Synthesis
DOI: 10.1055/b-00000101
Series Editors: Fürstner (Editor-in-Chief), A.; Carreira, E. M.; Faul, M.; Kobayashi, S.; Koch, G.; Molander, G. A.; Nevado, C.; Trost, B. M.; You, S.-L.
Type: Multivolume Edition
Abstract
The nucleophilic borylation of carbonyl groups and imines provides α-oxy and α-amino boronate esters, respectively, under a variety of metal-catalyzed and metal-free reaction conditions. The resulting boronate esters, which can be accessed in high enantiopurity, have been utilized in a variety of transformations based on the reactivity of the carbon–boron bond. For α-oxy boronate esters, the oxygen or boron is often protected for increased stability. Formation of carbon–carbon bonds by homologation reactions and Suzuki–Miyaura-type coupling reactions provides advanced intermediates in synthesis. A variety of methods have been developed for the asymmetric synthesis of α-amino boronate esters, a key precursor to the α-amino boronic acid pharmacophore. Application of these methods to the synthesis of bortezomib and a precursor to (R)-cetirizine have been demonstrated.
Key words
borylation - aldehydes - ketones - imines - homogeneous catalysis - asymmetric catalysis - organocatalysis - homologation - 1,2-metalate rearrangement - Suzuki–Miyaura coupling - bortezomib - cetirizine - α-hydroxy boronate esters - α-amino boronate esters - trifluoroborate salts- 1 P. F. Bross,, R. Kane,, A. T. Farrell,, S. Abraham,, K. Benson,, M. E. Brower,, S. Bradley,, J. V. Gobburu,, A. Goheer,, S.-L. Lee,, J. Leighton,, C. Y. Liang,, R. T. Lostritto,, W. D. McGuinn,, D. E. Morse,, A. Rahman,, L. A. Rosario,, S. L. Verbois,, G. Williams,, Y.-C. Wang,, R. Pazdur,. Clin. Cancer Res.. 2004; 10: 3954
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