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Light‐Driven Organocatalysis Using Inexpensive, Nontoxic Bi 2 O 3 as the Photocatalyst
Author(s) -
Riente Paola,
Matas Adams Alba,
Albero Josep,
Palomares Emilio,
Pericàs Miquel A.
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201405118
Subject(s) - enantioselective synthesis , catalysis , photocatalysis , sunlight , bismuth , organocatalysis , alkylation , chemistry , materials science , combinatorial chemistry , photochemistry , chemical engineering , organic chemistry , physics , optics , engineering
The development of enantioselective catalytic processes that make use of sunlight as the energy source and nontoxic, affordable materials as catalysts represents one of the new and rapidly evolving areas in chemical research. The direct asymmetric α‐alkylation of aldehydes with α‐bromocarbonyl compounds can be successfully achieved by combining bismuth‐based materials as low‐band‐gap photocatalysts with the second‐generation MacMillan imidazolidinone as the chiral catalyst and simulated sunlight as a low‐cost and clean energy source. This reaction also proceeded with high efficiency when the reaction vial was exposed to the morning sunlight on a clear September day in Tarragona, Spain.