A supramolecular bifunctional iridium photoaminocatalyst for the enantioselective alkylation of aldehydes†
Andrea
Gualandi, 
*a
Francesco
Calogero,
a
Arianna
Quintavalla,
a
Marianna
Marchini,
a
Paola
Ceroni,
*a
Marco
Lombardo
*a
and
Pier Giorgio
Cozzi
*a
*a
Francesco
Calogero,
a
Arianna
Quintavalla,
a
Marianna
Marchini,
a
Paola
Ceroni,
*a
Marco
Lombardo
*a
and
Pier Giorgio
Cozzi
*a
Abstract
The construction of a hybrid metal-organo-photoredox catalyst based on the conjugation of an imidazolidinone organocatalyst and Ir(ppy)2(bipy) (ppy = 2-phenylpyridine, bipy = bipyridine) is described. The introduction of the desired organocatalyst into the bipyridine moiety is quite modular, allowing the preparation of different hybrid photocatalysts, and is realized though a simple click reaction. The hybrid photocatalysts obtained were employed in the benchmark photoredox alkylation of aldehydes. Remarkably, the conjugation of a first-generation MacMillan catalyst produces an active and stereoselective hybrid photoredox catalyst.
- This article is part of the themed collection: Spotlight Collection: Photoinduced redox chemistry
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