Bifunctional catalysis
نویسندگان
چکیده
منابع مشابه
Bifunctional catalysis
Bifunctional catalysis concerns the use of low molecular weight, structurally defined molecules possessing two distinct functional groups to bring about new reactivity and/or selectivity in a reaction of interest. The reactions are typically polar addition reactions of pronucleophiles and electrophiles where, ideally, simple low-cost starting materials are converted into high-value, stereochemi...
متن کاملRecent progress in Lewis acid–Lewis base bifunctional asymmetric catalysis*
Two enantioselective cyanation reactions, the Strecker reaction of ketoimines and the Reissert reaction of pyridine derivatives, promoted by Lewis acid–Lewis base bifunctional asymmetric catalysts are described.
متن کاملBifunctional asymmetric catalysis: cooperative Lewis acid/base systems.
In the field of catalytic, asymmetric synthesis, there is a growing emphasis on multifunctional systems, in which multiple parts of a catalyst or multiple catalysts work together to promote a specific reaction. These efforts, in part, are result-driven, and they are also part of a movement toward emulating the efficiency and selectivity of nature's catalysts, enzymes. In this Account, we illust...
متن کاملBifunctional asymmetric catalysis: a tandem nucleophile/Lewis acid promoted synthesis of beta-lactams.
[reaction: see text]. We describe a superior procedure for the catalytic, asymmetric synthesis of beta-lactams using a bifunctional catalyst system consisting of a chiral nucleophile and an achiral Lewis acid.
متن کاملAcid-base bifunctional catalysis of silica-alumina-supported organic amines for carbon-carbon bond-forming reactions.
Acid-base bifunctional heterogeneous catalysts were prepared by the reaction of an acidic silica-alumina (SA) surface with silane-coupling reagents possessing amino functional groups. The obtained SA-supported amines (SA-NR2) were characterized by solid-state 13C and 29Si NMR spectroscopy, FT-IR spectroscopy, and elemental analysis. The solid-state NMR spectra revealed that the amines were immo...
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ژورنال
عنوان ژورنال: Beilstein Journal of Organic Chemistry
سال: 2016
ISSN: 1860-5397
DOI: 10.3762/bjoc.12.102