The synthesis of homochiral ligands based on [2.2]paracyclophane

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Abstract

A new ortho-lithiation of homochiral 4-N,N-diethylamido[2.2]paracyclophane 8 is the key to the production of a wide variety of 4,5-disubstituted homochiral ligands. ψ-Geminal bromination of 8 proceeds in high yields and the resulting bromide may be converted into a variety of 4,13-disubstituted ligands. The o-lithiation and ψ-geminal reactions can be used sequentially to give 4,5,12-trisubstituted compounds in which two liganding groups have the same geometrical relationship as in 'Phanephos'™. Homochiral oxazolines with only planar chirality have been made, one of which has been shown to be an effective catalyst for the Heck reaction. © 2001 Elsevier Science Ltd. All rights reserved.

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Pelter, A., Mootoo, B., Maxwell, A., & Reid, A. (2001). The synthesis of homochiral ligands based on [2.2]paracyclophane. Tetrahedron Letters, 42(47), 8391–8394. https://doi.org/10.1016/S0040-4039(01)01808-1

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