Oxazoline-based ligands
In 1986, Brunner et al. used PyOX as a ligand for asymmetric reactions,
which was the first reported oxazoline-based ligand used in asymmetric
reactions[1]. In
1991, in back-to-back communications in the Journal of the American
Chemical Society, the groups of Evans and Corey reported the synthesis
and utility of bisoxazoline ligands[2], since then,
oxazoline-based ligand become the most heavily studied in the literature
on the application of asymmetric catalysis, especially in
enantioselective aldol reactions[3], mannich
reactions[4],
Diels–Alder cycloadditions[5],
Michael addition[6],
free radical reactions[7], and other
reactions. So far, there are PHOX, FeOX, BOX, PyBOX and other kinds of
chiral oxazoline-based ligands. |
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[1] J. Organomet.
Chem., 1986, 316, C1. [2] (a) J. Am.
Chem. Soc., 1991,113, 726. (b) J. Am.
Chem. Soc., 1991,113, 728. [3] J. Am. Chem. Soc., 2012,
134, 15233. [4] Angew. Chem. Int.
Ed., 2001, 40, 2995. [5] J. Am.
Chem. Soc., 1991, 113, 728. [6] Angew.
Chem., Int. Ed., 2011, 50, 6392. [7] Nature, 2019,
574, 86.
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