Diastereoselective Hartwig-Buchwald reaction of chiral amines with rac-[2.2]paracyclophane derivatives |
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Authors: | Kreis Michael Friedmann Christian J Bräse Stefan |
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Institution: | Institut für Organische Chemie, Universit?t Karlsruhe TH, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany. |
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Abstract: | A Hartwig-Buchwald addition of a variety of chiral amines to rac-4-bromo-2.2]paracyclophane and rac-trifluoromethanesulfonic acid (4-2.2]paracyclophane) ester was performed with high diastereoselectivities. Kinetic racemic resolution of the starting materials was achieved, providing a rapid access to enantiomerically enriched 4-bromo-2.2]paracyclophane and the corresponding enantiomerically pure 2.2]paracyclophane amines. Additionally, the first reaction of a secondary amine with a 2.2]paracyclophane halide was achieved. |
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Keywords: | asymmetric catalysis catalyst screening cross‐coupling reaction palladium paracyclophanes |
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