Results 31 to 40 of about 2,722 (150)
Nature Communications, 2023 Heterohelicenes are of increasing importance in the fields of materials science, molecular recognition, and asymmetric catalysis. However, enantioselective construction of these molecules, especially by organocatalytic methods, is challenging, and few ...
Chengwen Li +6 more
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Chiral Phosphoric Acid Diesters as Ligands in Asymmetric Transition Metal Catalyzed Hydrogenation
CHIMIA, 2003 A chiral phosphoric acid diester, specifically the BINOL-based derivative, has been used for the first time in Rh-, Ir-, and Pd-catalyzed hydrogenation of olefins and imines, giving ee-values of up to 85%.
Manfred T. Reetz +2 more
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Applications of chiral spirocyclic phosphoric acid in the synthesis of natural products [PDF]
E3S Web of Conferences, 2021 With a 10 years development, chiral spirocyclic phosphoric acids (SPAs) have attracted a substantial amount of attention from the synthetic organic chemistry community. This kind of small molecule organic catalysts has some advantages like easy to obtain,
Yang Fan
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Development of diverse adjustable axially chiral biphenyl ligands and catalysts
iScience, 2023 Summary: Development of highly efficient and practical chiral ligands and catalysts is an eternal theme in asymmetric synthesis. Here, we report the design, synthesis, and evaluation of a new kind of adjustable axially chiral biphenyl ligands and ...
Jiyang Jie +3 more
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Beilstein Journal of Organic Chemistry, 2013 A chiral phosphoric acid-catalyzed selenofunctionalization of tryptamine derivatives provides access to 3a-(phenylselenyl)-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole derivatives in high yields and with synthetically useful levels of enantioselectivity ...
Qiang Wei +3 more
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Tetrahedron Chem, 2022 An organocatalytic asymmetric construction of hexahydropyrrolo[2,3-b]indole-containing tetrasubstituted allene scaffolds bearing both axial chirality and central chirality has been established via a cascade 1,8-addition/dearomatization-cyclization ...
Jing-Yi Wang +7 more
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Highly Enantioselective Hydrogenation of Enamides Catalyzed by Chiral Phosphoric Acids [PDF]
Organic Letters, 2009 A highly enantioselective hydrogenation of enamides catalyzed by a dual chiral-achiral acid system was developed. By employing a substoichiometric amount of a chiral phosphoric acid and acetic acid, catalyst loadings as low as 1 mol % of the chiral catalyst were sufficient to provide excellent yield and enantioselectivity of the reduction product.
Guilong, Li, Jon C, Antilla
openaire +2 more sources
Kinetic resolution of substituted amido[2.2]paracyclophanes via asymmetric electrophilic amination
Nature Communications, 2023 Planar chiral [2.2]paracyclophane derivatives are a type of structurally intriguing and practically useful chiral molecules, which have found a range of important applications in the field of asymmetric catalysis and material science.
Shaoze Yu +3 more
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Nature Communications, 2023 The C−N axially chiral N-arylpyrrole motifs are privileged scaffolds in numerous biologically active molecules and natural products, as well as in chiral ligands/catalysts.
Lei Dai +5 more
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Molecules, 2022 The significant scaffold offered by atropisomeric amides with a C–N chiral axis has been extensively utilized for pharmaceuticals, agricultural science, and organic syntheses.
Xiao Xiao +6 more
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