Utilizad este identificador para citar o enlazar este documento: http://hdl.handle.net/2072/226352

Translating the Enantioselective Michael Reaction to a Continuous Flow Paradigm with an Immobilized, Fluorinated Organocatalyst
Sagamanova, Irina; Rodríguez-Escrich, Carles; Molnár, Itsván; Sayalero, Sonia; Gilmour, Ryan; Pericàs, Miquel A.

A novel polymer-supported fluorinated organocatalyst has been prepared and benchmarked in the enantioselective Michael addition of aldehydes to nitroalkenes. The system has proven to be highly efficient and displays excellent selectivities (er and dr) with a wide variety of substrates. Detailed deactivation studies have given valuable insights, thus allowing the lifespan of this immobilized aminocatalyst to be significantly extended. These data have facilitated the implementation of enantioselective, continuous flow processes allowing either the multigram synthesis of a single Michael adduct over a 13 h period or the sequential generation of a library of enantiopure Michael adducts from different combinations of substrates (13 examples, 16 runs, 18.5 h total operation). A customized in-line aqueous workup, followed by liquid−liquid separation in flow, allows for product isolation without the need of chromatography or other separation techniques.

2015
fluorinated organocatalyst
continuous flow
polystyrene-supported catalysts
enantioselective catalysis
Michael reaction
© 2015 American Chemical Society
Artículo
https://dx.doi.org/10.1021/acscatal.5b01746
ACS Publications
ACS Catalysis
         

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