# Single enantiomer propeller-shaped polynuclear complexes as catalysts-proof-of-concept for enantioinduction in a Michael addition reaction

## TL;DR

Scientists created chiral metal complexes that can act as catalysts in a chemical reaction, showing a new way to induce chirality.

## Contribution

The study introduces a new type of chiral catalyst based on propeller-shaped polynuclear complexes.

## Key findings

- Propeller-shaped complexes were synthesized in enantiomerically pure form.
- The complexes catalyzed a Michael addition reaction with 1 mol% loading.
- Enantioselectivity was influenced by the complex's topology rather than ligand-metal binding.

## Abstract

We report a family of propeller-shaped polynuclear metal complexes whose overall chirality is dictated by a single stereogenic centre within their component amino alcohol-ligand. These topologically intriguing complexes are readily prepared in enantiomerically pure form and are shown here to catalyse the conjugate addition of barbituric acids and their derivatives to nitroalkenes, with a catalyst loading of 1 mol%. Although only low levels of enantioinduction are observed, control experiments indicate that the enantioselectivity is dictated by the overall topology of the complex and not governed by binding to the tetrametallic entity, heralding a potentially new mode of catalysis.