Results 71 to 80 of about 119,652 (298)
Molecules, 2017 An enantioselective (52–98% ee) Michael addition between cyclic β-diones and α,β-unsaturated enones was established in the presence of quinine-based primary amine or squaramide.
Qingqing Wang +6 more
doaj +1 more source
Atroposelective Construction of Axially Chiral Tetraarylethenes Via NHC‐Catalyzed Desymmetrization
Advanced Science, EarlyView.We report the first NHC‐catalyzed atroposelective synthesis of axially chiral TAEs via oxidative desymmetrization of prochiral TAE dialdehydes. This catalytic strategy operates under mild conditions and accommodates a broad range of phenolic and nitrogen nucleophiles, delivering diverse axially chiral TAEs in good yields and up to 99% ee.
Yang‐Ze Zheng +6 more
wiley +1 more source
Recent Developments in the Catalytic Enantioselective Sakurai Reaction
ReactionsThe Sakurai reaction constitutes a valuable tool for carbon–carbon bond formation. The use of nontoxic allylic reagents as well as the atom economy of the global process has prompted the development of enantioselective (aza)-variants based on the use of ...
Hélène Pellissier
doaj +1 more source
Radical Fluoroalkylation Reactions [PDF]
, 2018 Recent protocols and reactions for catalytic radical perfluoroalkylations will be described. The production of perfluoroalkyl radicals (RF = CnF2n+1, n ≥ 2), which effect both addition and substitution reactions on organic substrates, can be realized ...
Barata Vallejo, Sebastian +2 more
core +1 more source
Topological Materials and Related Applications
Advanced Electronic Materials, EarlyView.This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti +9 more
wiley +1 more source
Enantioselective Synthesis of (−)-Basiliskamide A [PDF]
Organic Letters, 2012 Basiliskamide A is an antifungal polyketide natural product isolated by Andersen and co-workers from a Bacillus laterosporus isolate, PNG-276. A nine-step enantioselective synthesis of (-)-basiliskamide A is reported, starting from commercially available β-hydroxy ester 7.
Ming, Chen, William R, Roush
openaire +2 more sources
Molecules, 2018 Oxazaborolidine catalyst (CBS catalyst) has been extensively used for catalytic borane reduction with a predictable absolute stereochemistry and high enantioselectivity.
Yasuhiro Kawanami, Ryo C. Yanagita
doaj +1 more source
The supramolecular attitude of metal-salophen and metal-salen complexes [PDF]
, 2018 In this review we cover some aspects of metal-salophen and metal-salen complex chemistry related to their supramolecular attitude. We examined under the lens of the non-covalent interactions their potential to behave as building blocks for auto-assembled
Dalla Cort, Antonella, Leoni, Luca
core +2 more sources
Directed enzyme evolution: climbing fitness peaks one amino acid at a time [PDF]
, 2009 Directed evolution can generate a remarkable range of new enzyme properties. Alternate substrate specificities and reaction selectivities are readily accessible in enzymes from families that are naturally functionally diverse.
Arnold, Frances H., Tracewell, Cara A.
core +2 more sources
Asymmetric One‐Pot Total Synthesis of Tenuipesone A/B Through a Tunable Multienzyme Cascade
ChemistryEuropeWhile biocatalysis has rapidly become a versatile tool in the synthetic chemist's toolbox, one of its main benefits, the broad cross‐compatibility of enzymes, which could lead to cell biochemistry‐like artificial metabolisms, is still underutilized in ...
Marleen Hallamaa +4 more
doaj +1 more source