Add time:07/19/2019         Source:sciencedirect.com

The enantioselective Friedel–Crafts addition of indoles to N-sulfonyl aldimines was studied using a heteroarylidene malonate-type bis(oxazoline) as a chiral ligand. High to excellent enantioselectivities (up to >99% ee) were achieved using the complex of copper(II)–L1b with a benzyl group. The effects of ligand structure, solvent, temperature and substrate on the reaction were also investigated.

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