Retraction: A miraculous chiral Ir–Rh bimetallic nanocatalyst for asymmetric hydrogenation of activated ketones
نویسندگان
چکیده
منابع مشابه
Asymmetric Hydrogenation and Transfer Hydrogenation of Ketones
Optically active alcohols are important building blocks in the synthesis of fine chemicals, pharmaceuticals, agrochemicals, flavors and fragrances as well as functional materials (Arai & Ohkuma, 2011; Klingler, 2007). Furthermore, molecular hydrogen is without doubt the cleanest reducing agent, with complete atom efficiency. Therefore, the catalytic, asymmetric hydrogenation (AH) of prochiral k...
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Asymmetric catalytic transfer hydrogenation using 2-propanol as a hydrogen source offers an attractive route for reducing simple unfunctionalized ketones to chiral alcohols.1 The reaction uses inexpensive reagents and is usually easy to perform. Notable among the recently developed efficient transition-metal-based chiral reduction catalysts2 is the Ru(II)-TsDPEN (TsDPEN ) N-(p-tolylsulfonyl)-1,...
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[reaction: see text]. A novel catalytic system for asymmetric hydrogenation of functionalized ketones has been developed using a Pd/bisphosphine complex as the catalyst in 2,2,2-trifluoroethanol. The reaction exhibits high enantioselectivity, and up to 92.2% ee was obtained.
متن کاملPhosphine-free chiral iridium catalysts for asymmetric catalytic hydrogenation of simple ketones
Novel pyridylalkylamine and aminopyridinato ligand stabilized iridium complexes with no P ligand are introduced. These complexes have been investigated as catalysts for asymmetric hydrogenation of simple ketones, resulting in an active catalyst for bulky alkyl aryl ketones that is a-methylpropiophenone. The ligands were synthesized from inexpensive starting materials and their modular design al...
متن کاملChiral bicyclic NHC/Ir complexes for catalytic asymmetric transfer hydrogenation of ketones.
A diverse series of chiral bicyclic NHC/Ir complexes were prepared via a previously developed divergent synthesis of chiral imidazolium salts. Among the complexes, 8dz was found to be an excellent catalyst precursor for the Ir-catalyzed asymmetric transfer hydrogenation of ketones. The reaction of ketones with 8dz proceeded smoothly to give corresponding alcohols with high enantioselectivities ...
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ژورنال
عنوان ژورنال: Organic Chemistry Frontiers
سال: 2019
ISSN: 2052-4129
DOI: 10.1039/c9qo90089f